US20260184986A1 · App 19/551,748

ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Publication

Country:US
Doc Number:20260184986
Kind:A1
Date:2026-07-02

Application

Country:US
Doc Number:19/551,748 (19551748)
Date:2026-02-27

Classifications

IPC Classifications

C09K11/06C07F15/00H10K50/11H10K85/30H10K85/60H10K101/10H10K101/30

CPC Classifications

C09K11/06C07F15/0086H10K85/322H10K85/346H10K85/361H10K85/658C09K2211/1055H10K50/11H10K2101/10H10K2101/30

Applicants

UNIVERSAL DISPLAY CORPORATION

Inventors

RASHA HAMZE, TYLER FLEETHAM, HSIAO-FAN CHEN, STEVEN KIT CHOW, THOMAS GHEBREGHIORGIS, HUONG NGUYEN, HAI T. LE

Abstract

Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]This application is a continuation of U.S. application Ser. No. 17/718,660, filed Apr. 12, 2022, which claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Application No. 63/175,703, filed on Apr. 16, 2021, the entire contents of which are incorporated herein by reference.

FIELD

[0002]The present disclosure generally relates to organometallic compounds and formulations and their various uses including as hosts and emitters in devices such as organic light emitting diodes and related electronic devices.

BACKGROUND

[0003]Opto-electronic devices that make use of organic materials are becoming increasingly desirable for various reasons. Many of the materials used to make such devices are relatively inexpensive, so organic opto-electronic devices have the potential for cost advantages over inorganic devices. In addition, the inherent properties of organic materials, such as their flexibility, may make them well suited for particular applications such as fabrication on a flexible substrate. Examples of organic opto-electronic devices include organic light emitting diodes/devices (OLEDs), organic phototransistors, organic photovoltaic cells, and organic photodetectors. For OLEDs, the organic materials may have performance advantages over conventional materials.

[0004]OLEDs make use of thin organic films that emit light when voltage is applied across the device. OLEDs are becoming an increasingly interesting technology for use in applications such as flat panel displays, illumination, and backlighting.

[0005]One application for phosphorescent emissive molecules is a full color display. Industry standards for such a display call for pixels adapted to emit particular colors, referred to as “saturated” colors. In particular, these standards call for saturated red, green, and blue pixels. Alternatively, the OLED can be designed to emit white light. In conventional liquid crystal displays emission from a white backlight is filtered using absorption filters to produce red, green and blue emission. The same technique can also be used with OLEDs. The white OLED can be either a single emissive layer (EML) device or a stack structure. Color may be measured using CIE coordinates, which are well known to the art.

SUMMARY

[0006]In one aspect, the present disclosure provides a compound comprising a ligand LA of a structure of

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wherein each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W; custom-character is a single bond or a double bond; X1-X4 are each independently C or N; the maximum number of N atoms that can connect to each other within a ring is two; Z is selected from the group consisting of BR and BRR′; YA is selected from the group consisting of O, S, Se, NR, CR, CRR′, BR, BRR′, and SiRR′; RA and RB each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring; each of R, R′, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of the general substituents defined herein; and any two adjacent R, R′, RA, or RB can be joined or fused to form a ring, wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au; wherein M can be coordinated to other ligands; and wherein the ligand LA can be monodentate, bidentate, tridentate, tetradentate, pentadentate, or hexadentate, with the proviso that ligand LA does not comprise a structure of
embedded image

wherein the dashed lines indicate direct bonds to M.

[0007]In another aspect, the present disclosure provides a formulation of a compound comprising a ligand LA of a structure of Formula I as described herein.

[0008]In yet another aspect, the present disclosure provides an OLED having an organic layer comprising a compound comprising a ligand LA of a structure of Formula I as described herein.

[0009]In yet another aspect, the present disclosure provides a consumer product comprising an OLED with an organic layer comprising a compound comprising a ligand LA of a structure of Formula I as described herein.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]FIG. 1 shows an organic light emitting device.

[0011]FIG. 2 shows an inverted organic light emitting device that does not have a separate electron transport layer.

[0012]FIGS. 3A, 3B and 3C show the emission spectra of an inventive compound of the present disclosure and a comparative compound in different media and at different temperatures.

DETAILED DESCRIPTION

A. Terminology

[0013]Unless otherwise specified, the below terms used herein are defined as follows:

[0014]As used herein, the term “organic” includes polymeric materials as well as small molecule organic materials that may be used to fabricate organic opto-electronic devices. “Small molecule” refers to any organic material that is not a polymer, and “small molecules” may actually be quite large. Small molecules may include repeat units in some circumstances. For example, using a long chain alkyl group as a substituent does not remove a molecule from the “small molecule” class. Small molecules may also be incorporated into polymers, for example as a pendent group on a polymer backbone or as a part of the backbone. Small molecules may also serve as the core moiety of a dendrimer, which consists of a series of chemical shells built on the core moiety. The core moiety of a dendrimer may be a fluorescent or phosphorescent small molecule emitter. A dendrimer may be a “small molecule,” and it is believed that all dendrimers currently used in the field of OLEDs are small molecules.

[0015]As used herein, “top” means furthest away from the substrate, while “bottom” means closest to the substrate. Where a first layer is described as “disposed over” a second layer, the first layer is disposed further away from substrate. There may be other layers between the first and second layer, unless it is specified that the first layer is “in contact with” the second layer. For example, a cathode may be described as “disposed over” an anode, even though there are various organic layers in between.

[0016]As used herein, “solution processable” means capable of being dissolved, dispersed, or transported in and/or deposited from a liquid medium, either in solution or suspension form.

[0017]A ligand may be referred to as “photoactive” when it is believed that the ligand directly contributes to the photoactive properties of an emissive material. A ligand may be referred to as “ancillary” when it is believed that the ligand does not contribute to the photoactive properties of an emissive material, although an ancillary ligand may alter the properties of a photoactive ligand.

[0018]As used herein, and as would be generally understood by one skilled in the art, a first “Highest Occupied Molecular Orbital” (HOMO) or “Lowest Unoccupied Molecular Orbital” (LUMO) energy level is “greater than” or “higher than” a second HOMO or LUMO energy level if the first energy level is closer to the vacuum energy level. Since ionization potentials (IP) are measured as a negative energy relative to a vacuum level, a higher HOMO energy level corresponds to an IP having a smaller absolute value (an IP that is less negative). Similarly, a higher LUMO energy level corresponds to an electron affinity (EA) having a smaller absolute value (an EA that is less negative). On a conventional energy level diagram, with the vacuum level at the top, the LUMO energy level of a material is higher than the HOMO energy level of the same material. A “higher” HOMO or LUMO energy level appears closer to the top of such a diagram than a “lower” HOMO or LUMO energy level.

[0019]As used herein, and as would be generally understood by one skilled in the art, a first work function is “greater than” or “higher than” a second work function if the first work function has a higher absolute value.

[0020]Because work functions are generally measured as negative numbers relative to vacuum level, this means that a “higher” work function is more negative. On a conventional energy level diagram, with the vacuum level at the top, a “higher” work function is illustrated as further away from the vacuum level in the downward direction.

[0021]Thus, the definitions of HOMO and LUMO energy levels follow a different convention than work functions.

[0022]The terms “halo,” “halogen,” and “halide” are used interchangeably and refer to fluorine, chlorine, bromine, and iodine.

[0023]The term “acyl” refers to a substituted carbonyl radical (C(O)—Rs).

[0024]The term “ester” refers to a substituted oxycarbonyl (—O—C(O)—Rs or —C(O)—O—Rs) radical.

[0025]The term “ether” refers to an —ORs radical.

[0026]The terms “sulfanyl” or “thio-ether” are used interchangeably and refer to a —SRs radical.

[0027]The term “selenyl” refers to a —SeRs radical.

[0028]The term “sulfinyl” refers to a —S(O)—Rs radical.

[0029]The term “sulfonyl” refers to a —SO2—Rs radical.

[0030]The term “phosphino” refers to a —P(Rs)3 radical, wherein each Rs can be same or different.

[0031]The term “silyl” refers to a —Si(Rs)3 radical, wherein each Rs can be same or different.

[0032]The term “germyl” refers to a —Ge(Rs)3 radical, wherein each Rs can be same or different.

[0033]The term “boryl” refers to a —B(Rs)2 radical or its Lewis adduct —B(Rs)3 radical, wherein Rs can be same or different.

[0034]In each of the above, Rs can be hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, and combination thereof. Preferred Rs is selected from the group consisting of alkyl, cycloalkyl, aryl, heteroaryl, and combination thereof.

[0035]The term “alkyl” refers to and includes both straight and branched chain alkyl radicals. Preferred alkyl groups are those containing from one to fifteen carbon atoms and includes methyl, ethyl, propyl, 1-methylethyl, butyl, 1-methylpropyl, 2-methylpropyl, pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 2,2-dimethylpropyl, and the like. Additionally, the alkyl group may be optionally substituted.

[0036]The term “cycloalkyl” refers to and includes monocyclic, polycyclic, and spiro alkyl radicals. Preferred cycloalkyl groups are those containing 3 to 12 ring carbon atoms and includes cyclopropyl, cyclopentyl, cyclohexyl, bicyclo[3.1.1]heptyl, spiro[4.5]decyl, spiro[5.5]undecyl, adamantyl, and the like. Additionally, the cycloalkyl group may be optionally substituted.

[0037]The terms “heteroalkyl” or “heterocycloalkyl” refer to an alkyl or a cycloalkyl radical, respectively, having at least one carbon atom replaced by a heteroatom. Optionally the at least one heteroatom is selected from O, S, N, P, B, Si and Se, preferably, O, S or N. Additionally, the heteroalkyl or heterocycloalkyl group may be optionally substituted.

[0038]The term “alkenyl” refers to and includes both straight and branched chain alkene radicals. Alkenyl groups are essentially alkyl groups that include at least one carbon-carbon double bond in the alkyl chain.

[0039]Cycloalkenyl groups are essentially cycloalkyl groups that include at least one carbon-carbon double bond in the cycloalkyl ring. The term “heteroalkenyl” as used herein refers to an alkenyl radical having at least one carbon atom replaced by a heteroatom. Optionally the at least one heteroatom is selected from O, S, N, P, B, Si, and Se, preferably, O, S, or N. Preferred alkenyl, cycloalkenyl, or heteroalkenyl groups are those containing two to fifteen carbon atoms. Additionally, the alkenyl, cycloalkenyl, or heteroalkenyl group may be optionally substituted.

[0040]The term “alkynyl” refers to and includes both straight and branched chain alkyne radicals. Alkynyl groups are essentially alkyl groups that include at least one carbon-carbon triple bond in the alkyl chain.

[0041]Preferred alkynyl groups are those containing two to fifteen carbon atoms. Additionally, the alkynyl group may be optionally substituted.

[0042]The terms “aralkyl” or “arylalkyl” are used interchangeably and refer to an alkyl group that is substituted with an aryl group. Additionally, the aralkyl group may be optionally substituted.

[0043]The term “heterocyclic group” refers to and includes aromatic and non-aromatic cyclic radicals containing at least one heteroatom. Optionally the at least one heteroatom is selected from O, S, N, P, B, Si, and Se, preferably, O, S, or N. Hetero-aromatic cyclic radicals may be used interchangeably with heteroaryl.

[0044]Preferred hetero-non-aromatic cyclic groups are those containing 3 to 7 ring atoms which includes at least one hetero atom, and includes cyclic amines such as morpholino, piperidino, pyrrolidino, and the like, and cyclic ethers/thio-ethers, such as tetrahydrofuran, tetrahydropyran, tetrahydrothiophene, and the like. Additionally, the heterocyclic group may be optionally substituted.

[0045]The term “aryl” refers to and includes both single-ring aromatic hydrocarbyl groups and polycyclic aromatic ring systems. The polycyclic rings may have two or more rings in which two carbons are common to two adjoining rings (the rings are “fused”) wherein at least one of the rings is an aromatic hydrocarbyl group, e.g., the other rings can be cycloalkyls, cycloalkenyls, aryl, heterocycles, and/or heteroaryls. Preferred aryl groups are those containing six to thirty carbon atoms, preferably six to twenty carbon atoms, more preferably six to twelve carbon atoms. Especially preferred is an aryl group having six carbons, ten carbons or twelve carbons. Suitable aryl groups include phenyl, biphenyl, triphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenalene, phenanthrene, fluorene, pyrene, chrysene, perylene, and azulene, preferably phenyl, biphenyl, triphenyl, triphenylene, fluorene, and naphthalene. Additionally, the aryl group may be optionally substituted.

[0046]The term “heteroaryl” refers to and includes both single-ring aromatic groups and polycyclic aromatic ring systems that include at least one heteroatom. The heteroatoms include, but are not limited to O, S, N, P, B, Si, and Se. In many instances, O, S, or N are the preferred heteroatoms. Hetero-single ring aromatic systems are preferably single rings with 5 or 6 ring atoms, and the ring can have from one to six heteroatoms. The hetero-polycyclic ring systems can have two or more rings in which two atoms are common to two adjoining rings (the rings are “fused”) wherein at least one of the rings is a heteroaryl, e.g., the other rings can be cycloalkyls, cycloalkenyls, aryl, heterocycles, and/or heteroaryls. The hetero-polycyclic aromatic ring systems can have from one to six heteroatoms per ring of the polycyclic aromatic ring system. Preferred heteroaryl groups are those containing three to thirty carbon atoms, preferably three to twenty carbon atoms, more preferably three to twelve carbon atoms. Suitable heteroaryl groups include dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indolocarbazole, pyridylindole, pyrrolodipyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indoxazine, benzoxazole, benzisoxazole, benzothiazole, quinoline, isoquinoline, cinnoline, quinazoline, quinoxaline, naphthyridine, phthalazine, pteridine, xanthene, acridine, phenazine, phenothiazine, phenoxazine, benzofuropyridine, furodipyridine, benzothienopyridine, thienodipyridine, benzoselenophenopyridine, and selenophenodipyridine, preferably dibenzothiophene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, triazine, benzimidazole, 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazine, and aza-analogs thereof. Additionally, the heteroaryl group may be optionally substituted.

[0047]Of the aryl and heteroaryl groups listed above, the groups of triphenylene, naphthalene, anthracene, dibenzothiophene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, pyrazine, pyrimidine, triazine, and benzimidazole, and the respective aza-analogs of each thereof are of particular interest.

[0048]The terms alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aralkyl, heterocyclic group, aryl, and heteroaryl, as used herein, are independently unsubstituted, or independently substituted, with one or more general substituents.

[0049]In many instances, the general substituents are selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

[0050]In some instances, the preferred general substituents are selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof.

[0051]In some instances, the preferred general substituents are selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, alkoxy, aryloxy, amino, silyl, boryl, aryl, heteroaryl, sulfanyl, and combinations thereof.

[0052]In yet other instances, the more preferred general substituents are selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, aryl, heteroaryl, and combinations thereof.

[0053]The terms “substituted” and “substitution” refer to a substituent other than H that is bonded to the relevant position, e.g., a carbon or nitrogen. For example, when R1 represents mono-substitution, then one R1 must be other than H (i.e., a substitution). Similarly, when R1 represents di-substitution, then two of R1 must be other than H. Similarly, when R1 represents zero or no substitution, R1, for example, can be a hydrogen for available valencies of ring atoms, as in carbon atoms for benzene and the nitrogen atom in pyrrole, or simply represents nothing for ring atoms with fully filled valencies, e.g., the nitrogen atom in pyridine. The maximum number of substitutions possible in a ring structure will depend on the total number of available valencies in the ring atoms.

[0054]As used herein, “combinations thereof” indicates that one or more members of the applicable list are combined to form a known or chemically stable arrangement that one of ordinary skill in the art can envision from the applicable list. For example, an alkyl and deuterium can be combined to form a partial or fully deuterated alkyl group; a halogen and alkyl can be combined to form a halogenated alkyl substituent; and a halogen, alkyl, and aryl can be combined to form a halogenated arylalkyl. In one instance, the term substitution includes a combination of two to four of the listed groups. In another instance, the term substitution includes a combination of two to three groups. In yet another instance, the term substitution includes a combination of two groups. Preferred combinations of substituent groups are those that contain up to fifty atoms that are not hydrogen or deuterium, or those which include up to forty atoms that are not hydrogen or deuterium, or those that include up to thirty atoms that are not hydrogen or deuterium. In many instances, a preferred combination of substituent groups will include up to twenty atoms that are not hydrogen or deuterium.

[0055]The “aza” designation in the fragments described herein, i.e. aza-dibenzofuran, aza-dibenzothiophene, etc. means that one or more of the C—H groups in the respective aromatic ring can be replaced by a nitrogen atom, for example, and without any limitation, azatriphenylene encompasses both dibenzo[f,h]quinoxaline and dibenzo[f,h]quinoline. One of ordinary skill in the art can readily envision other nitrogen analogs of the aza-derivatives described above, and all such analogs are intended to be encompassed by the terms as set forth herein.

[0056]As used herein, “deuterium” refers to an isotope of hydrogen. Deuterated compounds can be readily prepared using methods known in the art. For example, U.S. Pat. No. 8,557,400, Patent Pub. No. WO 2006/095951, and U.S. Pat. Application Pub. No. US 2011/0037057, which are hereby incorporated by reference in their entireties, describe the making of deuterium-substituted organometallic complexes. Further reference is made to Ming Yan, et al., Tetrahedron 2015, 71, 1425-30 and Atzrodt et al., Angew. Chem. Int. Ed. (Reviews) 2007, 46, 7744-65, which are incorporated by reference in their entireties, describe the deuteration of the methylene hydrogens in benzyl amines and efficient pathways to replace aromatic ring hydrogens with deuterium, respectively.

[0057]It is to be understood that when a molecular fragment is described as being a substituent or otherwise attached to another moiety, its name may be written as if it were a fragment (e.g. phenyl, phenylene, naphthyl, dibenzofuryl) or as if it were the whole molecule (e.g. benzene, naphthalene, dibenzofuran). As used herein, these different ways of designating a substituent or attached fragment are considered to be equivalent.

[0058]In some instance, a pair of adjacent substituents can be optionally joined or fused into a ring. The preferred ring is a five, six, or seven-membered carbocyclic or heterocyclic ring, includes both instances where the portion of the ring formed by the pair of substituents is saturated and where the portion of the ring formed by the pair of substituents is unsaturated. As used herein, “adjacent” means that the two substituents involved can be on the same ring next to each other, or on two neighboring rings having the two closest available substitutable positions, such as 2, 2′ positions in a biphenyl, or 1, 8 position in a naphthalene, as long as they can form a stable fused ring system.

B. The Compounds of the Present Disclosure

[0059]In one aspect, the present disclosure provides a compound comprising a ligand LA, wherein the ligand LA comprises a structure of

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    • [0060]wherein:
    • [0061]each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W;
    • [0062]custom-character is a single bond or a double bond;
    • [0063]X1-X4 are each independently C or N;
    • [0064]the maximum number of N atoms that can connect to each other within a ring is two;
    • [0065]Z is selected from the group consisting of BR and BRR′;
    • [0066]YA is selected from the group consisting of O, S, Se, NR, CR, CRR′, BR, BRR′, and SiRR′;
    • [0067]RA and RB each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring;
    • [0068]each of R, R′, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and any two adjacent R, R′, RA, or RB can be joined or fused to form a ring,
    • [0069]wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au;
    • [0070]wherein M can be coordinated to other ligands; and
    • [0071]wherein the ligand LA can be monodentate, bidentate, tridentate, tetradentate, pentadentate, or hexadentate, with the proviso that ligand LA does not comprise a structure of
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    • [0072]wherein the dashed lines indicate direct bonds to M.

[0073]In some embodiments, each of R, R′, RA, and RB can be independently a hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof.

[0074]In some embodiments, Z can be BR. In some embodiments, Z can be BRR′.

[0075]In some embodiments, each of R and R′ can be alkyl, cycloalkyl, aryl, aryloxy, arylamine, heteroaryl, heteroaryloxy, or heteroarylamine group. In some embodiments, each of R and R′ can be selected from benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, and their oxy and amine counterparts. In some embodiments, R and R′ can be joined to form a ring. In some embodiments, Rand R′ can be joined to form a 6-membered ring.

[0076]In some embodiments, YA can be O, S, or NR. In these embodiments, R can be alkyl, cycloalkyl, aryl, or heteroaryl. In these embodiments, R can be benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, or thiazole. In these embodiments, one R and one of RA or RB can be joined to form a ring. In these embodiments, one Rand one RA or RB can be joined to form a 5-membered or 6-membered ring.

[0077]In some embodiments, both X1 and X2 can be C. In some embodiments, one of X1 and X2 can be N, and the other C. In some embodiments, both X1 and X2 can be N.

[0078]In some embodiments, one of X3 and X4 can be N, and the other C. In some embodiments, both X3 and X4 can be C.

[0079]In some embodiments, moiety A can be a 5-membered aromatic ring. In some embodiments, moiety A can be imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, or thiazole. In some embodiments, moiety A can be a polycyclic ring structure comprising a 5-membered ring fused to ring W.

[0080]In some embodiments, moiety B can be a monocyclic 5-membered or 6-memebred aromatic ring. In some embodiments, moiety B can be a polycyclic ring structure comprising 5-membered and/or 6-membered aromatic rings. In some embodiments, moiety B can be selected from benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, naphthalene, quinoline, isoquinoline, quinazoline, benzofuran, benzoxazole, benzothiophene, benzothiazole, benzoselenophene, indene, indole, benzimidazole, carbazole, dibenzofuran, dibenzothiophene, quinoxaline, phthalazine, phenanthrene, phenanthridine, and fluorene.

[0081]In some embodiments, two adjacent RA substituents can be joined to form a ring fused to ring B. In some embodiments, two adjacent RB substituents can be joined to form a ring fused to ring A.

[0082]In some embodiments, the metal M can be Ir, Pt, or Pd.

[0083]In some embodiments, the compound can comprise a ligand LA of

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    • [0084]wherein:
    • [0085]moieties C, A1, B1, AA, and BB are each independently a monocyclic or polycyclic ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings;
    • [0086]Z1, Z2, and Z3 are each independently C or N;
    • [0087]L is selected from the group consisting of a single bond, O, S, CRR′, SiRR′, BR, and NR, each of RC, RA1, RB1, RAA, and RBB represents zero, mono, or up to the maximum allowed number of substitutions to its associated ring;
    • [0088]each of RC, RA1, RB1, RAA, and RBB is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; any two adjacent RC, RA1, RB1, RAA, or RBB can be joined or fused to form a ring; and
    • [0089]the remaining variables are the same as defined with respect to Formula I.

[0090]In some embodiments, RC, RAA, RA1, RB1, and RBB can be each independently a hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof.

[0091]In some embodiments, L can be a direct bond. In some embodiments, L can be NR. In these embodiments, R can be joined with one of RA, RB, RC, or RAA to form a ring. In these embodiments, R can be joined with one of RA, RB, RC, or RAA to form a 5-membered or 6-membered ring.

[0092]In some embodiments, Z1 can be N. In some embodiments, both Z2 and Z3 can be N. In some embodiments, both Z2 and Z3 can be C. In some embodiments, one of Z2 and Z3 can be C, and the other N.

[0093]In some embodiments, moiety C can be a 5-membered or 6-membered aromatic ring. In some embodiments, moiety C can be selected from the group consisting of benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, naphthalene, quinoline, isoquinoline, quinazoline, benzofuran, benzoxazole, benzothiophene, benzothiazole, benzoselenophene, indene, indole, benzimidazole, carbazole, dibenzofuran, dibenzothiophene, quinoxaline, phthalazine, phenanthrene, phenanthridine, and fluorene.

[0094]In some embodiments, moiety AA can be a 5-membered or 6-membered aromatic ring. In some embodiments, moiety AA is selected from the group consisting of benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, naphthalene, quinoline, isoquinoline, quinazoline, benzofuran, benzoxazole, benzothiophene, benzothiazole, benzoselenophene, indene, indole, benzimidazole, carbazole, dibenzofuran, dibenzothiophene, quinoxaline, phthalazine, phenanthrene, phenanthridine, and fluorene.

[0095]In some embodiments, moiety BB can be a 5-membered or 6-membered aromatic ring. In some embodiments, moiety BB can be selected from the group consisting of benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, naphthalene, quinoline, isoquinoline, quinazoline, benzofuran, benzoxazole, benzothiophene, benzothiazole, benzoselenophene, indene, indole, benzimidazole, carbazole, dibenzofuran, dibenzothiophene, quinoxaline, phthalazine, phenanthrene, phenanthridine, and fluorene.

[0096]In some embodiments, moiety A1 can be a 5-membered or 6-membered aromatic ring. In some embodiments, moiety A1 can be selected from the group consisting of benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, naphthalene, quinoline, isoquinoline, quinazoline, benzofuran, benzoxazole, benzothiophene, benzothiazole, benzoselenophene, indene, indole, benzimidazole, carbazole, dibenzofuran, dibenzothiophene, quinoxaline, phthalazine, phenanthrene, phenanthridine, and fluorene.

[0097]In some embodiments, moiety B1 can be a 5-membered or 6-membered aromatic ring. In some embodiments, moiety B1 can be selected from the group consisting of benzene, pyridine, pyrimidine, pyridazine, pyrazine, imidazole, pyrazole, pyrrole, oxazole, furan, thiophene, thiazole, naphthalene, quinoline, isoquinoline, quinazoline, benzofuran, benzoxazole, benzothiophene, benzothiazole, benzoselenophene, indene, indole, benzimidazole, carbazole, dibenzofuran, dibenzothiophene, quinoxaline, phthalazine, phenanthrene, phenanthridine, and fluorene.

[0098]In some embodiments, two adjacent RA1 can be joined to form a fused ring. In some embodiments, two adjacent RB1 can be joined to form a fused ring. In some embodiments, two adjacent RC can be joined to form a fused ring. In some embodiments, two adjacent RAA can be joined to form a fused ring. In some embodiments, two adjacent RBB can be joined to form a fused ring.

[0099]In some embodiments, M can be Ir or Pt.

[0100]In some embodiments, the ligand LA can be selected from the group consisting of the structures in the following LIST 1:

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    • [0101]wherein X is independently C, or N;
    • [0102]wherein Y1A, Y1B, Y1C, and Y1D are each independently selected from the group consisting of O, S, Se, NRCi, PRCi, BRCi, CRCiRCj, and SiRCiRCj;
    • [0103]wherein each Qqp can be independently selected from the group consisting of the structures in the following LIST 1a:
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    • [0104]wherein ZBi and ZBj are independently chosen from the general substituents defined herein; and
    • [0105]wherein RAi, RCi, RCj, RCk, RCl, RCm, and RCn are each independently selected from the general substituents defined herein.

[0106]In some of the above embodiments, ZBi and ZBj can be each independently chosen from the preferred general substituents defined herein. In some embodiments, each ZBi and ZBj can be independently selected from the group consisting of the structures in the following LIST 1b:

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[0107]In some of the above embodiments, RA1, RCi, RCj, HRCk, RCl, RCm, and RCn can be each independently selected from the preferred general substituents defined herein. In some of the above embodiments, RA1, RCi, RCj, RCk, RCl, RCm, and RCn can be each independently selected from the group consisting of the structures in the following LIST 1c:

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[0108]In some embodiments, the ligand LA is selected from the group consisting of the structures in the following LIST 2:

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    • [0109]wherein all the variables are the same as previously defined. In some of the above embodiments, ZBi and ZBj can be each independently chosen from the preferred general substituents defined herein. In some embodiments, each ZBi and ZBj can be independently selected from the group consisting of the structures in LIST 1b as defined herein. In some of the above embodiments, RAi, RCi, RCj, RCk, RCl, RCm, and RCn can be each independently selected from the preferred general substituents defined herein. In some of the above embodiments, RAi, RCi, RCj, RCk, RCl, RCm, and RCn can be each independently selected from the group consisting of the structures in LIST 1e defined herein.

[0110]In some embodiments, the ligand LA can be selected from the group consisting of the structures in the following LIST 3:

LAStructure of LA
LA1-(i)(v)(l), wherein LA1-(1)(1)(1) to LA1- (74)(70)(70), having the structure
LA2-(i)(w)(v)(l), wherein LA2- (1)(1)(1)(1) to LA2- (74)(75)(70)(70), having the structure
LA3-(v)(l)(p), wherein LA3-(1)(1)(1) to LA3- (70)(70)(40), having the structure
LA4-(i)(w)(v)(l), wherein LA4- (1)(1)(1)(1) to LA4- (74)(75)(70)(70), having the structure
LA5-(v)(l)(p), wherein LA5-(1)(1)(1) to LA5- (70)(70)(40), having the structure
LA6-(i)(v)(l)(m)(n), wherein LA6- (1)(1)(1)(1)(1) to LA6- (74)(70)(70)(70)(70), having the structure
LA7-(i)(w)(v)(l)(m)(n), wherein LA7- (1)(1)(1)(1)(1)(1) to LA7- (74)(75)(70)(70)(70)(70), having the structure
LA8-(v)(l)(m)(n)(p), wherein LA8- (1)(1)(1)(1)(1) to LA8- (70)(70)(70)(70)(40), having the structure
LA9-(v)(l)(m)(n)(p), wherein LA9- (1)(1)(1)(1)(1) to LA9- (70)(70)(70)(70)(40), having the structure
LA10-(i)(v)(l)(m)(n), wherein LA10- (1)(1)(1)(1)(1) to LA10- (74)(70)(70)(70)(70), having the structure
LA11- (i)(w)(v)(l)(m)(n), wherein LA11- (1)(1)(1)(1)(1)(1) to LA11- (74)(75)(70)(70)(70)(70), having the structure
LA12-(v)(l)(m)(n)(p), wherein LA12- (1)(1)(1)(1)(1) to LA12- (70)(70)(70)(70)(40), having the structure
LA13-(v)(l)(m)(n)(p), wherein LA13 - (1)(1)(1)(1)(1) to LA13- (70)(70)(70)(70)(40), having the structure
LA14-(i)(v)(l)(o), wherein LA14- (1)(1)(1)(1) to LA14- (74)(70)(70)(63), having the structure
LA15-(v)(l)(o)(p), wherein LA15- (1)(1)(1)(1) to LA15- (70)(70)(63)(40), having the structure
LA16-(v)(l)(o)(p), wherein LA16- (1)(1)(1)(1) to LA16- (70)(70)(63)(40), having the structure
LA17-(i)(v)(l)(m)(n), wherein LA17- (1)(1)(1)(1)(1) to LA17- (74)(70)(70)(70)(70), having the structure
LA18- (i)(w)(v)(l)(m)(n), wherein LA18- (1)(1)(1)(1)(1)(1) to LA18- (74)(75)(70)(70)(70)(70), having the structure
LA19-(v)(l)(m)(n)(p), wherein LA19- (1)(1)(1)(1)(1) to LA19- (70)(70)(70)(70)(40), having the structure
LA20-(v)(l)(m)(n)(p), wherein LA20- (1)(1)(1)(1)(1) to LA20- (70)(70)(70)(70)(40), having the structure
LA21-(i)(v)(l), wherein LA21-(1)(1)(1) to LA21- (74)(70)(70), having the structure
LA22-(i)(w)(v)(l), wherein LA22- (1)(1)(1)(1) to LA22- (74)(75)(70)(70), having the structure
LA23-(v)(l)(p), wherein LA23-(1)(1)(1) to LA23- (70)(70)(40), having the structure
LA24-(v)(l)(p), wherein LA24-(1)(1)(1) to LA24- (70)(70)(40), having the structure
LA25-(i)(v)(l), wherein LA25-(1)(1)(1) to LA25- (74)(70)(70), having the structure
LA26-(i)(w)(v)(l), wherein LA26- (1)(1)(1)(1) to LA26- (74)(75)(70)(70), having the structure
LA27-(v)(l)(p), wherein LA27-(1)(1)(1) to LA27- (70)(70)(40), having the structure
LA28-(v)(l)(p), wherein LA28-(1)(1)(1) to LA28- (70)(70)(40), having the structure
LA29-(i)(v)(l)(o), wherein LA29- (1)(1)(1)(1) to LA29- (74)(70)(70)(63), having the structure
LA30-(i)(w)(v)(l)(o), wherein LA30- (1)(1)(1)(1)(1) to LA30- (74)(75)(70)(70)(63), having the structure
LA31-(v)(l)(o)(p), wherein LA31-(1)(1)(1)(1) to LA31-(70)(70)(63)(40), having the structure
LA32-(v)(l)(o)(p), wherein LA32-(1)(1)(1)(1) to LA32-(70)(70)(63)(40), having the structure
LA33-(i)(v)(l)(o)(h), wherein LA33- (1)(1)(1)(1)(1) to LA33- (74)(70)(70)(63)(63), having the structure
LA34-(i)(w)(v)(l)(o)(h), wherein LA34- (1)(1)(1)(1)(1)(1) to LA34- (74)(75)(70)(70)(63)(63), having the structure
LA35-(v)(l)(o)(h)(p), wherein LA35- (1)(1)(1)(1)(1) to LA35- (70)(70)(63)(63)(40), having the structure
LA36-(v)(l)(o)(h)(p), wherein LA36- (1)(1)(1)(1)(1) to LA36- (70)(70)(63)(63)(40), having the structure
LA37-(i)(v)(l)(m)(n), wherein LA37- (1)(1)(1)(1)(1) to LA37- (74)(70)(70)(70)(70), having the structure
LA38-(v)(l)(m)(n)(p), wherein LA38- (1)(1)(1)(1)(1) to LA38- (70)(70)(70)(70)(40), having the structure
LA39-(i)(v)(l)(m)(n), wherein LA39- (1)(1)(1)(1)(1) to LA39- (74)(70)(70)(70)(70), having the structure
LA40-(i)(w)(v)(l)(m)(n), wherein LA40- (1)(1)(1)(1)(1)(1) to LA40- (74)(75)(70)(70)(70)(70), having the structure
LA41-(v)(l)(m)(n)(p), wherein LA41- (1)(1)(1)(1)(1) to LA41- (70)(70)(70)(70)(40), having the structure
LA42-(v)(l)(m)(n)(p), wherein LA42- (1)(1)(1)(1)(1) to LA42- (70)(70)(70)(70)(40), having the structure
LA43-(i)(v)(l)(m)(n), wherein LA43- (1)(1)(1)(1)(1) to LA43- (74)(70)(70)(70)(70), having the structure
LA44-(i)(w)(v)(l)(m)(n), wherein LA44- (1)(1)(1)(1)(1)(1) to LA44- (74)(75)(70)(70)(70)(70), having the structure
LA45-(v)(l)(m)(n)(p), wherein LA45- (1)(1)(1)(1)(1) to LA45- (70)(70)(70)(70)(40), having the structure
LA46-(i)(v)(l), wherein LA46-(1)(1)(1) to LA46- (74)(70)(70), having the structure
LA47-(i)(w)(v)(l), wherein LA47-(1)(1)(1)(1) to LA47-(74)(75)(70)(70), having the structure
LA48-(v)(l)(p), wherein LA48-(1)(1)(1) to LA48- (70)(70)(40), having the structure
LA49-(v)(l)(p), wherein LA49-(1)(1)(1) to LA49(70)(70)(40), having the structure
LA50-(v)(o)(h)(r), wherein LA50-(1)(1)(1)(1) to LA50-(70)(63)(63)(63), having the structure
LA51-(v)(o)(h)(r)(t)(u), wherein LA51- (1)(1)(1)(1)(1)(1) to LA51- (70)(63)(63)(63)(63)(63), having the structure
LA52-(i)(v)(o)(h), wherein LA52-(1)(1)(1)(1) to LA52-(74)(70)(63)(63), having the structure
LA53-(i)(w)(v)(o)(h), wherein LA53- (1)(1)(1)(1)(1) to LA53- (74)(75)(70)(63)(63), having the structure
LA54-(i)(w)(v)(o)(h), wherein LA54- (1)(1)(1)(1)(1) to LA54- (74)(75)(70)(63)(63), having the structure
LA55-(o)(h)(p), wherein LA55-(1)(1)(1) to LA55- (63)(63)(40), having the structure
LA56-(o)(h)(p), wherein LA56-(1)(1)(1) to LA56- (63)(63)(40), having the structure
LA57-(o)(h)(p), wherein LA57-(1)(1)(1) to LA57- (63)(63)(40), having the structure

    • wherein i and w are each independently an integer from 1 to 74; v, l, m, and n are each independently an integer from 1 to 70; o, h, r, t, and u are each independently an integer from 1 to 63; and p is an integer from 1 to 40;
    • wherein the structure of each each Zi and Zw is defined in the following LIST 3a:

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    • [0113]wherein the structure of each Qp is defined in the following LIST 3b:
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    • [0114]wherein the structures of each Rv, Rl, Rm, Rn, Ro, Rh, Ru, Rr, and Rt is defined in the following LIST 3c:
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[0115]In some embodiments, the compound can have a formula of M(LA)p(LB)q(LC)r wherein LB and LC are each a bidentate ligand; and wherein p is 1, 2, or 3; q is 0, 1, or 2; r is 0, 1, or 2; and p+q+r is the oxidation state of the metal M. In some embodiments, the compound can have a formula selected from the group consisting of Ir(LA)3, Ir(LA)(LB)2, Ir(LA)2(LB), Ir(LA)2(Lc), and Ir(LA)(LB)(LC); and wherein LA, LB, and LC are different from each other. In some embodiments, LB can be a substituted or unsubstituted phenylpyridine, and LC can be a substituted or unsubstituted acetylacetonate. In some embodiments, the compound can have a formula of Pt(LA)(LB); and wherein LA and LB can be same or different. In some embodiments, LA and LB can be connected to form a tetradentate ligand.

[0116]In some embodiments, LB and LC can be each independently selected from the group consisting of:

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    • [0117]wherein:
    • [0118]T is selected from the group consisting of B, Al, Ga, and In;
    • [0119]each of Y1 to Y13 is independently selected from the group consisting of carbon and nitrogen;
    • [0120]Y1 is selected from the group consisting of BRe, BRRf, NRe, PRe, P(O)R, O, S, Se, C═O, C=S, C=Se, C=NRe, C=CReRf, S═O, SO2, CReRf, SiReRf, and GeReRf;
    • [0121]Re and Rf can be fused or joined to form a ring;
    • [0122]each Ra, Rb, Rc, and Rd independently represents zero, mono, or up to the maximum allowed number of substitutions to its associated ring;
    • [0123]each of Ra1, Rb1, Rc1, Rd1, Ra, Rb, Rc, Rd, Re and Rf is independently a hydrogen or a subsituent selected from the group consisting of the general substituents defined herein; and
    • [0124]two adjacent Ra, Rb, Rc, and Rd can be fused or joined to form a ring or form a multidentate ligand.

[0125]In some embodiments, LB and LC can be each independently selected from the group consisting of the structures in the following LIST 4:

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    • [0126]wherein:
    • [0127]Ra′, Rb′, and Rc′ each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring;
    • [0128]each of Ra1, Rb1, Rc1, RB, RN, Ra′, Rb′, and Rc′ is independently hydrogen or a substituent selected from the group consisting of the general substituents defined herein; and
    • [0129]two adjacent Ra′, Rb′, and Rc′ can be fused or joined to form a ring or form a multidentate ligand.
[0130]
In some embodiments, the compound can be selected from the group consisting of Ir(LA)3, Ir(LA)(LBk)2, Ir(LA)2(LBk), Ir(LA)2(LCj-II), Ir(LA)2(LCj-II), Ir(LA) (LBk) (LCj-I), and Ir(LA) (LBk) (LCj-II), wherein LA is selected from the structures defined herein;
    • [0131]wherein k is an integer from 1 to 546, and the structure of each LB1 to LB546 is defined in the following LIST 5:
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    • [0132]wherein each LCj-I has a structure based on formula
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    • [0133]and
    • [0134]each LCj-II has a structure based on formula
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    • [0135]wherein for each LCj in LCj-I and LCj-II, R201 and R202 are each independently defined in the following LIST 6:
LCjR201R202LCjR201R202LCjR201R202LCjR201R202
LC1RD1RD1LC193RD1RD3LC385RD17RD40LC577RD143RD120
LC2RD2RD2LC194RD1RD4LC386RD17RD41LC578RD143RD133
LC3RD3RD3LC195RD1RD5LC387RD17RD42LC579RD143RD134
LC4RD4RD4LC196RD1RD9LC388RD17RD43LC580RD143RD135
LC5RD5RD5LC197RD1RD10LC389RD17RD48LC581RD143RD136
LC6RD6RD6LC198RD1RD17LC390RD17RD49LC582RD143RD144
LC7RD7RD7LC199RD1RD18LC391RD17RD50LC583RD143RD145
LC8RD8RD8LC200RD1RD20LC392RD17RD54LC584RD143RD146
LC9RD9RD9LC201RD1RD22LC393RD17RD55LC585RD143RD147
LC10RD10RD10LC202RD1RD37LC394RD17RD58LC586RD143RD149
LC11RD11RD11LC203RD1RD40LC395RD17RD59LC587RD143RD151
LC12RD12RD12LC204RD1RD41LC396RD17RD78LC588RD143RD154
LC13RD13RD13LC205RD1RD42LC397RD17RD79LC589RD143RD155
LC14RD14RD14LC206RD1RD43LC398RD17RD81LC590RD143RD161
LC15RD15RD15LC207RD1RD48LC399RD17RD87LC591RD143RD175
LC16RD16RD16LC208RD1RD49LC400RD17RD88LC592RD144RD3
LC17RD17RD17LC209RD1RD50LC401RD17RD89LC593RD144RD5
LC18RD18RD18LC210RD1RD54LC402RD17RD93LC594RD144RD17
LC19RD19RD19LC211RD1RD55LC403RD17RD116LC595RD144RD18
LC20RD20RD20LC212RD1RD58LC404RD17RD117LC596RD144RD20
LC21RD21RD21LC213RD1RD59LC405RD17RD118LC597RD144RD22
LC22RD22RD22LC214RD1RD78LC406RD17RD119LC598RD144RD37
LC23RD23RD23LC215RD1RD79LC407RD17RD120LC599RD144RD40
LC24RD24RD24LC216RD1RD81LC408RD17RD133LC600RD144RD41
LC25RD25RD25LC217RD1RD87LC409RD17RD134LC601RD144RD42
LC26RD26RD26LC218RD1RD88LC410RD17RD135LC602RD144RD43
LC27RD27RD27LC219RD1RD89LC411RD17RD136LC603RD144RD48
LC28RD28RD28LC220RD1RD93LC412RD17RD143LC604RD144RD49
LC29RD29RD29LC221RD1RD116LC413RD17RD144LC605RD144RD54
LC30RD30RD30LC222RD1RD117LC414RD17RD145LC606RD144RD58
LC31RD31RD31LC223RD1RD118LC415RD17RD146LC607RD144RD59
LC32RD32RD32LC224RD1RD119LC416RD17RD147LC608RD144RD78
LC33RD33RD33LC225RD1RD120LC417RD17RD149LC609RD144RD79
LC34RD34RD34LC226RD1RD133LC418RD17RD151LC610RD144RD81
LC35RD35RD35LC227RD1RD134LC419RD17RD154LC611RD144RD87
LC36RD36RD36LC228RD1RD135LC420RD17RD155LC612RD144RD88
LC37RD37RD37LC229RD1RD136LC421RD17RD161LC613RD144RD89
LC38RD38RD38LC230RD1RD143LC422RD17RD175LC614RD144RD93
LC39RD39RD39LC231RD1RD144LC423RD50RD3LC615RD144RD116
LC40RD40RD40LC232RD1RD145LC424RD50RD5LC616RD144RD117
LC41RD41RD41LC233RD1RD146LC425RD50RD18LC617RD144RD118
LC42RD42RD42LC234RD1RD147LC426RD50RD20LC618RD144RD119
LC43RD43RD43LC235RD1RD149LC427RD50RD22LC619RD144RD120
LC44RD44RD44LC236RD1RD151LC428RD50RD37LC620RD144RD133
LC45RD45RD45LC237RD1RD154LC429RD50RD40LC621RD144RD134
LC46RD46RD46LC238RD1RD155LC430RD50RD41LC622RD144RD135
LC47RD47RD47LC239RD1RD161LC431RD50RD42LC623RD144RD136
LC48RD48RD48LC240RD1RD175LC432RD50RD43LC624RD144RD145
LC49RD49RD49LC241RD4RD3LC433RD50RD48LC625RD144RD146
LC50RD50RD50LC242RD4RD5LC434RD50RD49LC626RD144RD147
LC51RD51RD51LC243RD4RD9LC435RD50RD54LC627RD144RD149
LC52RD52RD52LC244RD4RD10LC436RD50RD55LC628RD144RD151
LC53RD53RD53LC245RD4RD17LC437RD50RD58LC629RD144RD154
LC54RD54RD54LC246RD4RD18LC438RD50RD59LC630RD144RD155
LC55RD55RD55LC247RD4RD20LC439RD50RD78LC631RD144RD161
LC56RD56RD56LC248RD4RD22LC440RD50RD79LC632RD144RD175
LC57RD57RD57LC249RD4RD37LC441RD50RD81LC633RD145RD3
LC58RD58RD58LC250RD4RD40LC442RD50RD87LC634RD145RD5
LC59RD59RD59LC251RD4RD41LC443RD50RD88LC635RD145RD17
LC60RD60RD60LC252RD4RD42LC444RD50RD89LC636RD145RD18
LC61RD61RD61LC253RD4RD43LC445RD50RD93LC637RD145RD20
LC62RD62RD62LC254RD4RD48LC446RD50RD116LC638RD145RD22
LC63RD63RD63LC255RD4RD49LC447RD50RD117LC639RD145RD37
LC64RD64RD64LC256RD4RD50LC448RD50RD118LC640RD145RD40
LC65RD65RD65LC257RD4RD54LC449RD50RD119LC641RD145RD41
LC66RD66RD66LC258RD4RD55LC450RD50RD120LC642RD145RD42
LC67RD67RD67LC259RD4RD58LC451RD50RD133LC643RD145RD43
LC68RD68RD68LC260RD4RD59LC452RD50RD134LC644RD145RD48
LC69RD69RD69LC261RD4RD78LC453RD50RD135LC645RD145RD49
LC70RD70RD70LC262RD4RD79LC454RD50RD136LC646RD145RD54
LC71RD71RD71LC263RD4RD81LC455RD50RD143LC647RD145RD58
LC72RD72RD72LC264RD4RD87LC456RD50RD144LC648RD145RD59
LC73RD73RD73LC265RD4RD88LC457RD50RD145LC649RD145RD78
LC74RD74RD74LC266RD4RD89LC458RD50RD146LC650RD145RD79
LC75RD75RD75LC267RD4RD93LC459RD50RD147LC651RD145RD81
LC76RD76RD76LC268RD4RD116LC460RD50RD149LC652RD145RD87
LC77RD77RD77LC269RD4RD117LC461RD50RD151LC653RD145RD88
LC78RD78RD78LC270RD4RD118LC462RD50RD154LC654RD145RD89
LC79RD79RD79LC271RD4RD119LC463RD50RD155LC655RD145RD93
LC80RD80RD80LC272RD4RD120LC464RD50RD161LC656RD145RD116
LC81RD81RD81LC273RD4RD133LC465RD50RD175LC657RD145RD117
LC82RD82RD82LC274RD4RD134LC466RD55RD3LC658RD145RD118
LC83RD83RD83LC275RD4RD135LC467RD55RD5LC659RD145RD119
LC84RD84RD84LC276RD4RD136LC468RD55RD18LC660RD145RD120
LC85RD85RD85LC277RD4RD143LC469RD55RD20LC661RD145RD133
LC86RD86RD86LC278RD4RD144LC470RD55RD22LC662RD145RD134
LC87RD87RD87LC279RD4RD145LC471RD55RD37LC663RD145RD135
LC88RD88RD88LC280RD4RD146LC472RD55RD40LC664RD145RD136
LC89RD89RD89LC281RD4RD147LC473RD55RD41LC665RD145RD146
LC90RD90RD90LC282RD4RD149LC474RD55RD42LC666RD145RD147
LC91RD91RD91LC283RD4RD151LC475RD55RD43LC667RD145RD149
LC92RD92RD92LC284RD4RD154LC476RD55RD48LC668RD145RD151
LC93RD93RD93LC285RD4RD155LC477RD55RD49LC669RD145RD154
LC94RD94RD94LC286RD4RD161LC478RD55RD54LC670RD145RD155
LC95RD95RD95LC287RD4RD175LC479RD55RD58LC671RD145RD161
LC96RD96RD96LC288RD9RD3LC480RD55RD59LC672RD145RD175
LC97RD97RD97LC289RD9RD5LC481RD55RD78LC673RD146RD3
LC98RD98RD98LC290RD9RD10LC482RD55RD79LC674RD146RD5
LC99RD99RD99LC291RD9RD17LC483RD55RD81LC675RD146RD17
LC100RD100RD100LC292RD9RD18LC484RD55RD87LC676RD146RD18
LC101RD101RD101LC293RD9RD20LC485RD55RD88LC677RD146RD20
LC102RD102RD102LC294RD9RD22LC486RD55RD89LC678RD146RD22
LC103RD103RD103LC295RD9RD37LC487RD55RD93LC679RD146RD37
LC104RD104RD104LC296RD9RD40LC488RD55RD116LC680RD146RD40
LC105RD105RD105LC297RD9RD41LC489RD55RD117LC681RD146RD41
LC106RD106RD106LC298RD9RD42LC490RD55RD118LC682RD146RD42
LC107RD107RD107LC299RD9RD43LC491RD55RD119LC683RD146RD43
LC108RD108RD108LC300RD9RD48LC492RD55RD120LC684RD146RD48
LC109RD109RD109LC301RD9RD49LC493RD55RD133LC685RD146RD49
LC110RD110RD110LC302RD9RD50LC494RD55RD134LC686RD146RD54
LC111RD111RD111LC303RD9RD54LC495RD55RD135LC687RD146RD58
LC112RD112RD112LC304RD9RD55LC496RD55RD136LC688RD146RD59
LC113RD113RD113LC305RD9RD58LC497RD55RD143LC689RD146RD78
LC114RD114RD114LC306RD9RD59LC498RD55RD144LC690RD146RD79
LC115RD115RD115LC307RD9RD78LC499RD55RD145LC691RD146RD81
LC116RD116RD116LC308RD9RD79LC500RD55RD146LC692RD146RD87
LC117RD117RD117LC309RD9RD81LC501RD55RD147LC693RD146RD88
LC118RD118RD118LC310RD9RD87LC502RD55RD149LC694RD146RD89
LC119RD119RD119LC311RD9RD88LC503RD55RD151LC695RD146RD93
LC120RD120RD120LC312RD9RD89LC504RD55RD154LC696RD146RD117
LC121RD121RD121LC313RD9RD93LC505RD55RD155LC697RD146RD118
LC122RD122RD122LC314RD9RD116LC506RD55RD161LC698RD146RD119
LC123RD123RD123LC315RD9RD117LC507RD55RD175LC699RD146RD120
LC124RD124RD124LC316RD9RD118LC508RD116RD3LC700RD146RD133
LC125RD125RD125LC317RD9RD119LC509RD116RD5LC701RD146RD134
LC126RD126RD126LC318RD9RD120LC510RD116RD17LC702RD146RD135
LC127RD127RD127LC319RD9RD133LC511RD116RD18LC703RD146RD136
LC128RD128RD128LC320RD9RD134LC512RD116RD20LC704RD146RD146
LC129RD129RD129LC321RD9RD135LC513RD116RD22LC705RD146RD147
LC130RD130RD130LC322RD9RD136LC514RD116RD37LC706RD146RD149
LC131RD131RD131LC323RD9RD143LC515RD116RD40LC707RD146RD151
LC132RD132RD132LC324RD9RD144LC516RD116RD41LC708RD146RD154
LC133RD133RD133LC325RD9RD145LC517RD116RD42LC709RD146RD155
LC134RD134RD134LC326RD9RD146LC518RD116RD43LC710RD146RD161
LC135RD135RD135LC327RD9RD147LC519RD116RD48LC711RD146RD175
LC136RD136RD136LC328RD9RD149LC520RD116RD49LC712RD133RD3
LC137RD137RD137LC329RD9RD151LC521RD116RD54LC713RD133RD5
LC138RD138RD138LC330RD9RD154LC522RD116RD58LC714RD133RD3
LC139RD139RD139LC331RD9RD155LC523RD116RD59LC715RD133RD18
LC140RD140RD140LC332RD9RD161LC524RD116RD78LC716RD133RD20
LC141RD141RD141LC333RD9RD175LC525RD116RD79LC717RD133RD22
LC142RD142RD142LC334RD10RD3LC526RD116RD81LC718RD133RD37
LC143RD143RD143LC335RD10RD5LC527RD116RD87LC719RD133RD40
LC144RD144RD144LC336RD10RD17LC528RD116RD88LC720RD133RD41
LC145RD145RD145LC337RD10RD18LC529RD116RD89LC721RD133RD42
LC146RD146RD146LC338RD10RD20LC530RD116RD93LC722RD133RD43
LC147RD147RD147LC339RD10RD22LC531RD116RD117LC723RD133RD48
LC148RD148RD148LC340RD10RD37LC532RD116RD118LC724RD133RD49
LC149RD149RD149LC341RD10RD40LC533RD116RD119LC725RD133RD54
LC150RD150RD150LC342RD10RD41LC534RD116RD120LC726RD133RD58
LC151RD151RD151LC343RD10RD42LC535RD116RD133LC727RD133RD59
LC152RD152RD152LC344RD10RD43LC536RD116RD134LC728RD133RD78
LC153RD153RD153LC345RD10RD48LC537RD116RD135LC729RD133RD79
LC154RD154RD154LC346RD10RD49LC538RD116RD136LC730RD133RD81
LC155RD155RD155LC347RD10RD50LC539RD116RD143LC731RD133RD87
LC156RD156RD156LC348RD10RD54LC540RD116RD144LC732RD133RD88
LC157RD157RD157LC349RD10RD55LC541RD116RD145LC733RD133RD89
LC158RD158RD158LC350RD10RD58LC542RD116RD146LC734RD133RD93
LC159RD159RD159LC351RD10RD59LC543RD116RD147LC735RD133RD117
LC160RD160RD160LC352RD10RD78LC544RD116RD149LC736RD133RD118
LC161RD161RD161LC353RD10RD79LC545RD116RD151LC737RD133RD119
LC162RD162RD162LC354RD10RD81LC546RD116RD154LC738RD133RD120
LC163RD163RD163LC355RD10RD87LC547RD116RD155LC739RD133RD133
LC164RD164RD164LC356RD10RD88LC548RD116RD161LC740RD133RD134
LC165RD165RD165LC357RD10RD89LC549RD116RD175LC741RD133RD135
LC166RD166RD166LC358RD10RD93LC550RD143RD3LC742RD133RD136
LC167RD167RD167LC359RD10RD116LC551RD143RD5LC743RD133RD146
LC168RD168RD168LC360RD10RD117LC552RD143RD17LC744RD133RD147
LC169RD169RD169LC361RD10RD118LC553RD143RD18LC745RD133RD149
LC170RD170RD170LC362RD10RD119LC554RD143RD20LC746RD133RD151
LC171RD171RD171LC363RD10RD120LC555RD143RD22LC747RD133RD154
LC172RD172RD172LC364RD10RD133LC556RD143RD37LC748RD133RD155
LC173RD173RD173LC365RD10RD134LC557RD143RD40LC749RD133RD161
LC174RD174RD174LC366RD10RD135LC558RD143RD41LC750RD133RD175
LC175RD175RD175LC367RD10RD136LC559RD143RD42LC751RD175RD3
LC176RD176RD176LC368RD10RD143LC560RD143RD43LC752RD175RD5
LC177RD177RD177LC369RD10RD144LC561RD143RD48LC753RD175RD18
LC178RD178RD178LC370RD10RD145LC562RD143RD49LC754RD175RD20
LC179RD179RD179LC371RD10RD146LC563RD143RD54LC755RD175RD22
LC180RD180RD180LC372RD10RD147LC564RD143RD58LC756RD175RD37
LC181RD181RD181LC373RD10RD149LC565RD143RD59LC757RD175RD40
LC182RD182RD182LC374RD10RD151LC566RD143RD78LC758RD175RD41
LC183RD183RD183LC375RD10RD154LC567RD143RD79LC759RD175RD42
LC184RD184RD184LC376RD10RD155LC568RD143RD81LC760RD175RD43
LC185RD185RD185LC377RD10RD161LC569RD143RD87LC761RD175RD48
LC186RD186RD186LC378RD10RD175LC570RD143RD88LC762RD175RD49
LC187RD187RD187LC379RD17RD3LC571RD143RD89LC763RD175RD54
LC188RD188RD188LC380RD17RD5LC572RD143RD93LC764RD175RD58
LC189RD189RD189LC381RD17RD18LC573RD143RD116LC765RD175RD59
LC190RD190RD190LC382RD17RD20LC574RD143RD117LC766RD175RD78
LC191RD191RD191LC383RD17RD22LC575RD143RD118LC767RD175RD79
LC192RD192RD192LC384RD17RD37LC576RD143RD119LC768RD175RD81
LC769RD193RD193LC877RD1RD193LC985RD4RD193LC1093RD9RD193
LC770RD194RD194LC878RD1RD194LC986RD4RD194LC1094RD9RD194
LC771RD195RD195LC879RD1RD195LC987RD4RD195LC1095RD9RD195
LC772RD196RD196LC880RD1RD196LC988RD4RD196LC1096RD9RD196
LC773RD197RD197LC881RD1RD197LC989RD4RD197LC1097RD9RD197
LC774RD198RD198LC882RD1RD198LC990RD4RD198LC1098RD9RD198
LC775RD199RD199LC883RD1RD199LC991RD4RD199LC1099RD9RD199
LC776RD200RD200LC884RD1RD200LC992RD4RD200LC1100RD9RD200
LC777RD201RD201LC885RD1RD201LC993RD4RD201LC1101RD9RD201
LC778RD202RD202LC886RD1RD202LC994RD4RD202LC1102RD9RD202
LC779RD203RD203LC887RD1RD203LC995RD4RD203LC1103RD9RD203
LC780RD204RD204LC888RD1RD204LC996RD4RD204LC1104RD9RD204
LC781RD205RD205LC889RD1RD205LC997RD4RD205LC1105RD9RD205
LC782RD206RD206LC890RD1RD206LC998RD4RD206LC1106RD9RD206
LC783RD207RD207LC891RD1RD207LC999RD4RD207LC1107RD9RD207
LC784RD208RD208LC892RD1RD208LC1000RD4RD208LC1108RD9RD208
LC785RD209RD209LC893RD1RD209LC1001RD4RD209LC1109RD9RD209
LC786RD210RD210LC894RD1RD210LC1002RD4RD210LC1110RD9RD210
LC787RD211RD211LC895RD1RD211LC1003RD4RD211LC1111RD9RD211
LC788RD212RD212LC896RD1RD212LC1004RD4RD212LC1112RD9RD212
LC789RD213RD213LC897RD1RD213LC1005RD4RD213LC1113RD9RD213
LC790RD214RD214LC898RD1RD214LC1006RD4RD214LC1114RD9RD214
LC791RD215RD215LC899RD1RD215LC1007RD4RD215LC1115RD9RD215
LC792RD216RD216LC900RD1RD216LC1008RD4RD216LC1116RD9RD216
LC793RD217RD217LC901RD1RD217LC1009RD4RD217LC1117RD9RD217
LC794RD218RD218LC902RD1RD218LC1010RD4RD218LC1118RD9RD218
LC795RD219RD219LC903RD1RD219LC1011RD4RD219LC1119RD9RD219
LC796RD220RD220LC904RD1RD220LC1012RD4RD220LC1120RD9RD220
LC797RD221RD221LC905RD1RD221LC1013RD4RD221LC1121RD9RD221
LC798RD222RD222LC906RD1RD222LC1014RD4RD222LC1122RD9RD222
LC799RD223RD223LC907RD1RD223LC1015RD4RD223LC1123RD9RD223
LC800RD224RD224LC908RD1RD224LC1016RD4RD224LC1124RD9RD224
LC801RD225RD225LC909RD1RD225LC1017RD4RD225LC1125RD9RD225
LC802RD226RD226LC910RD1RD226LC1018RD4RD226LC1126RD9RD226
LC803RD227RD227LC911RD1RD227LC1019RD4RD227LC1127RD9RD227
LC804RD228RD228LC912RD1RD228LC1020RD4RD228LC1128RD9RD228
LC805RD229RD229LC913RD1RD229LC1021RD4RD229LC1129RD9RD229
LC806RD230RD230LC914RD1RD230LC1022RD4RD230LC1130RD9RD230
LC807RD231RD231LC915RD1RD231LC1023RD4RD231LC1131RD9RD231
LC808RD232RD232LC916RD1RD232LC1024RD4RD232LC1132RD9RD232
LC809RD233RD233LC917RD1RD233LC1025RD4RD233LC1133RD9RD233
LC810RD234RD234LC918RD1RD234LC1026RD4RD234LC1134RD9RD234
LC811RD235RD235LC919RD1RD235LC1027RD4RD235LC1135RD9RD235
LC812RD236RD236LC920RD1RD236LC1028RD4RD236LC1136RD9RD236
LC813RD237RD237LC921RD1RD237LC1029RD4RD237LC1137RD9RD237
LC814RD238RD238LC922RD1RD238LC1030RD4RD238LC1138RD9RD238
LC815RD239RD239LC923RD1RD239LC1031RD4RD239LC1139RD9RD239
LC816RD240RD240LC924RD1RD240LC1032RD4RD240LC1140RD9RD240
LC817RD241RD241LC925RD1RD241LC1033RD4RD241LC1141RD9RD241
LC818RD242RD242LC926RD1RD242LC1034RD4RD242LC1142RD9RD242
LC819RD243RD243LC927RD1RD243LC1035RD4RD243LC1143RD9RD243
LC820RD244RD244LC928RD1RD244LC1036RD4RD244LC1144RD9RD244
LC821RD245RD245LC929RD1RD245LC1037RD4RD243LC1145RD9RD245
LC822RD246RD246LC930RD1RD246LC1038RD4RD246LC1146RD9RD246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    • wherein RD1 to RD246 have the following structures:

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[0137]In some embodiments, the compound can have the formula Ir(LA)(LBk)2 or Ir(LA)2(LBk), wherein the compound consists of only one of the following structures for the LBk ligand (LIST 7):

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[0138]In some embodiments, the compound can have the formula Ir(LA)(LBk)2 or Ir(LA)2(LBk), wherein the compound consists of only one of the following structures for the LBk ligand (LIST 8):

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[0139]In some embodiments, the compound can have the formula Ir(LA)2(LCj-I) or Ir(LA)2(LCj-II), wherein for ligands LCj-I and LCj-II, the compound comprises only those LCj-I and LCj-II ligands whose corresponding R201 and R202 are defined to be one the following structures:

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[0140]In some embodiments, the compound can have the formula Ir(LA)2(LCj-I) or Ir(LA)2(LCj-II), wherein for ligands LCj-I and LCj-II, the compound comprises only those LCj-I and LCj-II ligands whose the corresponding R201 and R202 are defined to be one of the following structures:

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[0141]In some embodiments, the compound can have the formula Ir(LA)2(LCj-I), and the compound consists of only one of the following structures for the LCj-I ligand:

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[0142]In some embodiments, the compound can be selected from the group consisting of the structures in the following LIST 9:

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[0143]In some embodiments, the compound can have a structure of

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    • [0144]wherein:
    • [0145]M1 is Pd or Pt;
    • [0146]moiety Q is selected from the group consisting of Formula IIA, Formula JIB, Formula IIC, Formula IID, Formula IIE, Formula IIF, Formula IIG, Formula IIH, and Formula IIJ;
    • [0147]moieties F and E are each independently a monocyclic or polycyclic ring structure comprising a 5-membered and/or 6-membered carbocyclic or heterocyclic rings;
    • [0148]Z4 and Z5 are each independently C or N;
    • [0149]K1, K2, K3, and K4 are each independently selected from the group consisting of a direct bond, O, and S, wherein at least two of them are direct bonds;
    • [0150]L1, L2, and L3 are each independently selected from the group consisting of a single bond, absent a bond, O, Se, S, SO, SO2, C=O, C=CR′R″, C=NR′R″, CR′R″, SiR′R″, BR′, P(O)R′, and NR′, wherein at least one of L′ and L2 is present;
    • [0151]X20-X22 are each independently C or N;
    • [0152]RF and RE each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring;
    • [0153]each of R′, R″, RF, and RE is independently a hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof; and
    • [0154]the remaining variables are all the same as defined for Formula II.

[0155]In some embodiments, moiety F and moiety E can be both 6-membered aromatic rings. In some embodiments, moiety F can be a 5-membered or 6-membered heteroaromatic ring.

[0156]In some embodiments, L1 can be O or CR′R″. In some embodiments, L2 can be a direct bond. In some embodiments, L2 can be NR′.

[0157]In some embodiments, Z2 can be N and Z1 can be C. In some embodiments, Z2 can be C and Z1 can be N.

[0158]In some embodiments, one of K1, K2, K3, or K4 can be O. In some embodiments, one of K1, or K2 can be O. In some embodiments, one of K3, or K4 can be O. In some embodiments, K1, K2, K3, and K4 can be all direct bonds.

[0159]In some embodiments, X20-X22 can be all C.

[0160]In some embodiments, the compound can be selected from the group consisting of compounds having the formula of Pt(LA′)(Ly):

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    • [0161]wherein LA′ is selected from the group consisting of the structures in the following LIST 10:
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    • [0162]wherein Ly is selected from the group consisting of the the structures in the following LIST 11:
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    • [0163]wherein X is each independently C or N;
    • [0164]wherein Y1A, Y1B, Y1C, and Y1D are each independently selected from the group consisting of O, S, Se, NRCi, PRCi, BRCi, CRCiRCj, and SiRCiRCj
    • [0165]wherein ZBi and ZBj are independently selected from the group consisting of the general substituents defined herein;
    • [0166]wherein Qqp is selected from the group consisting of the structures in LIST 1a defined herein; and
    • [0167]wherein RE, RF, RX, RY, RAi, RCi, RCj, RCk, RCl, RCm, and RCn are each independently selected from the group consisting of the general substituents defined herein. In some of the above embodiments, ZBi and ZBj can be independently selected from the group consisting of the preferred general substituents defined herein. In some of the above embodiments, ZBi and ZBj can be independently selected from the group consisting of the structures in LIST 1b defined here. In some of the above embodiments, RE, RF, RX, RY, RAi, RCi, RCj, RCk, RCl, RCm, and Rcn can be each independently selected from the group consisting of the preferred general substituents defined herein. In some of the above embodiments, RE, RF, RX, RY, RAi, RCi, RCj, RCk, RCl, RCm, and RCn can be each independently selected from the group consisting of the structures in LIST 1c defined herein.

[0168]In some embodiments, the compound can be selected from the group consisting of the compounds having the formula of Pt(LA′)(Ly):

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    • [0169]wherein LA′ is selected from the group consisting of the structures shown in the following LIST 12:
LA′Structure of LA′
LA′1-(i)(v)(l), wherein LA′1-(1)(1)(1) to LA′1- (74)(70)(70), having the structure
LA′2-(i)(w)(v)(l), wherein LA′2-(1)(1)(1)(1) to LA′2- (74)(74)(70)(70), having the structure
LA′3-(v)(l)(p), wherein LA′3-(1)(1)(1) to LA′3- (70)(70)(40), having the structure
LA′4-(i)(w)(v)(l), wherein LA′4-(1)(1)(1)(1) to LA′4- (74)(74)(70)(70), having the structure
LA′5-(v)(l)(p), wherein LA′5-(1)(1)(1) to LA′5- (70)(70)(40), having the structure
LA′6-(i)(v)(w)(l)(m)(n), wherein LA′6-(1)(1)(1)(1)(1) to LA′6- (74)(70)(70)(70)(70), having the structure
LA′7-(i)(w)(v)(l)(m)(n), wherein LA′7-(1)(1)(1)(1)(1)(1) to LA′7- (74)(74)(70)(70)(70)(70), having the structure
LA′8-(v)(l)(m)(n)(p), wherein LA′8-(1)(1)(1)(1)(1) to LA′8- (70)(70)(70)(70)(40), having the structure
LA′9-(v)(l)(m)(n)(p), wherein LA′9-(1)(1)(1)(1)(1) to LA′9- (70)(70)(70)(70)(40), having the structure
LA′10-(i)(w)(l)(m)(n), wherein LA′10-(1)(1)(1)(1)(1)(1) to LA′10- (74)(70)(70)(70)(70), having the structure
LA′11-(i)(w)(v)(l)(m)(n), wherein LA′11-(1)(1)(1)(1)(1)(1) to LA′11- (74)(74)(70)(70)(70)(70), having the structure
LA′12-(v)(l)(m)(n)(p), wherein LA′12-(1)(1)(1)(1)(1) to LA′12- (70)(70)(70)(70)(40), having the structure
LA′13-(i)(v)(l)(0), wherein LA′13-(1)(1)(1)(1)(1) to LA′13- (70)(70)(70)(70)(40), having the structure
LA′14-(i)(w)(v)(l)(o), wherein LA′14-(1)(1)(1)(1)(1) to LA′14- (74)(74)(70)(70)(63), having the structure
LA′15-(v)(l)(o)(p), wherein LA′15-(1)(1)(1)(1) to LA′15- (70)(70)(63)(40), having the structure
LA′16-(v)(l)(o)(p), wherein LA′16-(1)(1)(1)(1) to LA′16- (70)(70)(63)(40), having the structure
LA′17-(v)(l)(m)(n)(p), wherein LA′17-(1)(1)(1)(1)(1) to LA′17- (70)(70)(70)(70)(40), having the structure
LA′18-(i)(v)(l)(m)(n), wherein LA′18-(1)(1)(1)(1)(1) to LA′18- (74)(70)(70)(70)(70), having the structure
LA′19-(v)(l)(m)(n)(p), wherein LA′19-(1)(1)(1)(1)(1) to LA′19- (70)(70)(70)(70)(40), having the structure
LA′20-(i)(w)(v)(l)(m)(n), wherein LA′20-(1)(1)(1)(1)(1) to LA′20- (74)(74)(70)(70)(70)(70), having the structure
LA′21-(i)(v)(l), wherein LA′21-(1)(1)(1) to LA′21- (74)(70)(70), having the structure
LA′22-(i)(w)(v)(l), wherein LA′22-(1)(1)(1)(1) to LA′22- (74)(74)(70)(70), having the structure
LA′23-(v)(l)(p), wherein LA′23-(1)(1)(1) to LA′23- (70)(70)(40), having the structure
LA′24-(v)(l)(p), wherein LA′24-(1)(1)(1) to LA′24- (70)(70)(40), having the structure
LA′25-(i)(v)(l), wherein LA′25-(1)(1)(1) to LA′25- (74)(70)(70), having the structure
LA′26-(i)(w)(v)(l), wherein LA′26-(1)(1)(1)(1) to LA′26- (74)(74)(70)(70), having the structure
LA′27-(v)(l)(p), wherein LA′27-(1)(1)(1) to LA′27- (70)(70)(40), having the structure
LA′28-(v)(l)(p), wherein LA′28-(1)(1)(1) to LA′28- (70)(70)(40), having the structure
LA′29-(i)(v)(l)(o), wherein LA′29-(1)(1)(1)(1) to LA′29- (74)(70)(70)(63), having the structure
LA′30-(i)(w)(v)(l)(o), wherein LA′30-(1)(1)(1)(1)(1) to LA′30- (74)(74)(70)(70)(63), having the structure
LA′31-(v)(l)(o)(p), wherein LA′31-(1)(1)(1)(1) to LA′31- (70)(70)(63)(40), having the structure
LA′32-(v)(l)(o)(p), wherein LA′32-(1)(1)(1)(1) to LA′32- (70)(70)(63)(40), having the structure
LA′33-(i)(v)(l)(o)(h), wherein LA′33-(1)(1)(1)(1)(1) to LA′33- (74)(70)(70)(63)(63), having the structure
LA′34-(i)(w)(v)(l)(o)(h), wherein LA′34-(1)(1)(1)(1)(1)(1) to LA′34- (74)(74)(70)(70)(63)(63), having the structure
LA′35-(v)(l)(o)(q)(p), wherein LA′35-(1)(1)(1)(1)(1) to LA′35- (70)(70)(63)(63)(40), having the structure
LA′36-(i)(w)(v)(l)(o)(h)(p), wherein LA′36-(1)(1)(1)(1)(1) to LA′36- (70)(70)(63)(63)(40), having the structure
LA′37-(i)(v)(l)(m)(n), wherein LA′37-(1)(1)(1)(1)(1) to LA′37- (74)(70)(70)(70)(70), having the structure
LA′38-(v)(l)(m)(n)(p), wherein LA′38-(1)(1)(1)(1)(1) to LA′38- (70)(70)(70)(70)(40), having the structure
LA′39-(i)(v)(l)(m)(n), wherein LA′39-(1)(1)(1)(1)(1) to LA′39- (74)(70)(70)(70)(70), having the structure
LA′40-(i)(w)(v)(l)(m)(n), wherein LA′40-(1)(1)(1)(1)(1)(1) to LA′40- (74)(74)(70)(70)(70)(70), having the
LA′41-(v)(l)(m)(n)(p), wherein LA′41-(1)(1)(1)(1)(1) to LA′41- (70)(70)(70)(70)(40), having the structure
LA′42-(v)(l)(m)(n)(p), wherein LA′42-(1)(1)(1)(1)(1) to LA′42- (70)(70)(70)(70)(40), having the structure
LA′43-(i)(v)(l)(m)(n), wherein LA′43-(1)(1)(1)(1)(1) to LA′43- (74)(70)(70)(70)(70), having the structure
LA′44-(i)(w)(v)(l)(m)(n), wherein LA′44-(1)(1)(1)(1)(1)(1) to LA′44- (74)(74)(70)(70)(70)(70), having the structure
LA′45-(v)(l)(m)(n)(p), wherein LA′45-(1)(1)(1)(1)(1) to LA′45- (70)(70)(70)(70)(40), having the structure
LA′46-(i)(v)(l), wherein LA′46-(1)(1)(1) to LA′46- (74)(70)(70), having the structure
LA′47-(i)(w)(v)(l), wherein LA′47-(1)(1)(1)(1) to LA′47- (74)(74)(70)(70), having the structure
LA′48-(v)(l)(p), wherein LA′48-(1)(1)(1) to LA′48- (70)(70)(40), having the structure
LA′49-(v)(l)(p), wherein LA′49-(1)(1)(1) to LA′49- (70)(70)(40), having the structure
LA′50-(v)(o)(h)(r), wherein LA′50-(1)(1)(1)(1) to LA′50- (70)(63)(63)(63), having the structure
LA′51-(v)(o)(h)(r)(t)(u), wherein LA′51-(1)(1)(1)(1)(1)(1) to LA′51- (70)(63)(63)(63)(63)(63), having the structure
LA′52-(i)(o), wherein LA′52-(1)(1) to LA′52- (74)(63), having the structure
LA′53-(i)(w)(o), wherein LA′53-(1)(1)(1) to LA′53- (74)(74)(63), having the structure
LA′54-(p)(o), wherein LA′54-(1)(1) to LA′54- (40)(63)(70), having the structure
LA′55-(p)(o), wherein LA′55-(1)(1) to LA′55- (40)(63)(70), having the structure
LA′56-(i)(w)(o), wherein LA′56-(1)(1)(1) to LA′56- (74)(74)(63), having the structure
LA′57-(p)(o), wherein LA′57-(1)(1) to LA′57- (40)(63)(70), having the structure

    • wherein Ly is selected from the group consisting of the structures shown in the following LIST 13:

LyStructure of Ly
Ly1-(o)(p)(q), wherein Ly1-(1)(1)(1) to Ly1- (63)(70)(70), having the structure
Ly2-(o)(p)(q), wherein Ly2-(1)(1)(1) to Ly2- (63)(70)(70), having the structure
Ly3-(o)(p)(q), wherein Ly3-(1)(1)(1) to Ly3- (63)(70)(70), having the structure
Ly4-(o)(p)(q), wherein Ly4-(1)(1)(1) to Ly4- (63)(70)(70), having the structure
Ly5-(s)(p)(q), wherein Ly5-(1)(1)(1) to Ly5- (63)(70)(70), having the structure
Ly6-(s)(p)(q), wherein Ly6-(1)(1)(1) to Ly6- (63)(70)(70), having the structure
Ly7-(o)(p)(q), wherein Ly7-(1)(1)(1) to Ly7- (63)(70)(70), having the structure
Ly8-(o)(p)(q), wherein Ly8-(1)(1)(1) to Ly8- (63)(70)(70), having the structure
Ly9-(s)(p)(q), wherein Ly9-(1)(1)(1) to Ly9- (70)(70)(70), having the structure
Ly10-(s)(p)(q), wherein Ly10-(1)(1)(1) to Ly10- (70)(70)(70), having the structure
Ly11-(s)(p)(q), wherein Ly11-(1)(1)(1) to Ly11- (70)(70)(70), having the structure
Ly12-(s)(p)(q), wherein Ly12-(1)(1)(1) to Ly12- (70)(70)(70), having the structure
Ly13-(s)(p)(q), wherein Ly13-(1)(1)(1) to Ly13- (70)(70)(70), having the structure
Ly14-(s)(p)(q), wherein Ly14-(1)(1)(1) to Ly14- (70)(70)(70), having the structure
Ly15-(o)(p)(q), wherein Ly15-(1)(1)(1) to Ly15- (63)(70)(70), having the structure
Ly16-(o)(p)(q), wherein Ly16-(1)(1)(1) to Ly16- (63)(70)(70), having the structure
Ly17-(s)(p)(q), wherein Ly17-(1)(1)(1) to Ly17- (70)(70)(70), having the structure
Ly18-(o)(p)(q), wherein Ly18-(1)(1)(1) to Ly18- (63)(70)(70), having the structure
Ly19-(o)(p)(q), wherein Ly19-(1)(1)(1) to Ly19- (63)(70)(70), having the structure
Ly20-(s)(p)(q), wherein Ly20-(1)(1)(1) to Ly20- (70)(70)(70), having the structure
Ly21-(o)(p)(q), wherein Ly21-(1)(1)(1) to Ly21- (63)(70)(70), having the structure
Ly22-(o)(p)(q), wherein Ly22-(1)(1)(1) to Ly22- (63)(70)(70), having the structure
Ly23-(o)(p)(q), wherein Ly23-(1)(1)(1) to Ly23- (63)(70)(70), having the structure
Ly24-(s)(p)(q), wherein Ly24-(1)(1)(1) to Ly24- (70)(70)(70), having the structure
Ly25-(s)(p)(q), wherein Ly25-(1)(1)(1) to Ly25- (70)(70)(70), having the structure
Ly26-(s)(p)(q), wherein Ly26-(1)(1)(1) to Ly26- (70)(70)(70), having the structure
Ly27-(s)(p)(q), wherein Ly27-(1)(1)(1) to Ly27- (70)(70)(70), having the structure
Ly28-(s)(p)(q), wherein Ly28-(1)(1)(1) to Ly28- (70)(70)(70), having the structure
Ly29-(s)(p)(q), wherein Ly29-(1)(1)(1) to Ly29- (70)(70)(70), having the structure
Ly30-(s)(p)(q), wherein Ly30-(1)(1)(1) to Ly30- (70)(70)(70), having the structure
Ly31-(s)(p)(q), wherein Ly31-(1)(1)(1) to Ly31- (70)(70)(70), having the structure
Ly32-(o)(p)(q), wherein Ly32-(1)(1)(1) to Ly32- (63)(70)(70), having the structure
Ly33-(o)(p)(q), wherein Ly33-(1)(1)(1) to Ly33- (63)(70)(70), having the structure

    • wherein i and w are each independently an integer from 1 to 74;
    • v, l, m, n, p, q, and s are each independently an integer from 1 to 70;
    • o, h, r, t, and u are each independently an integer from 1 to 63;
    • p is an integer from 1 to 40;
    • wherein the structures of Z1 to Z74 are as shown in LIST 3a defined herein;
    • wherein the structures of Q1 to Q40 are as shown in LIST 3b defined herein; and
    • wherein the structures of R1 to R70 are as shown in LIST 3c defined herein.

[0178]In some embodiments, the compound can be selected from the group consisting of the structures in the following LIST 14:

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[0179]In some embodiments, the compound having a ligand LA of Formula I described herein can be at least 30% deuterated, at least 40% deuterated, at least 50% deuterated, at least 60% deuterated, at least 70% deuterated, at least 80% deuterated, at least 90% deuterated, at least 95% deuterated, at least 99% deuterated, or 100% deuterated. As used herein, percent deuteration has its ordinary meaning and includes the percent of possible hydrogen atoms (e.g., positions that are hydrogen, deuterium, or halogen) that are replaced by deuterium atoms.

C. The OLEDs and the Devices of the Present Disclosure

[0180]In another aspect, the present disclosure also provides an OLED device comprising an organic layer that contains a compound as disclosed in the above compounds section of the present disclosure.

[0181]In some embodiments, the OLED comprises an anode, a cathode, and a first organic layer disposed between the anode and the cathode. The first organic layer can comprise a compound comprising a ligand LA of a structure of

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    • [0182]wherein each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W; custom-character is a single bond or a double bond; X1-X4 are each independently C or N; the maximum number of N atoms that can connect to each other within a ring is two; Z is selected from the group consisting of BR and BRR′; YA is selected from the group consisting of O, S, Se, NR, CR, CRR′, BR, BRR′, and SiRR′; RA and RB each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring; each of R, R′, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of the general substituents defined herein; and any two adjacent R, R′, RA, or RB can be joined or fused to form a ring, wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au; wherein M can be coordinated to other ligands; and wherein the ligand LA can be monodentate, bidentate, tridentate, tetradentate, pentadentate, or hexadentate, with the proviso that ligand LA does not comprise a structure of
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wherein the dashed lines indicate direct bonds to M.

[0183]In some embodiments, the organic layer may be an emissive layer and the compound as described herein may be an emissive dopant or a non-emissive dopant.

[0184]In some embodiments, the organic layer may further comprise a host, wherein the host comprises a triphenylene containing benzo-fused thiophene or benzo-fused furan, wherein any substituent in the host is an unfused substituent independently selected from the group consisting of CnH2n+1, OCnH2n+1, OAr1, N(CnH2n+1)2, N(Ar1)(Ar2), CH═CH—CnH2n+1, C≡CCnH2n+1, Ar1, Ar1—Ar2, CnH2n—Ar1, or no substitution, wherein n is an integer from 1 to 10; and wherein Ar1 and Ar2 are independently selected from the group consisting of benzene, biphenyl, naphthalene, triphenylene, carbazole, and heteroaromatic analogs thereof.

[0185]In some embodiments, the organic layer may further comprise a host, wherein host comprises at least one chemical group selected from the group consisting of triphenylene, carbazole, indolocarbazole, dibenzothiophene, dibenzofuran, dibenzoselenophene, 5λ2-benzo[d]benzo[4,5]imidazo[3,2-a]imidazole, 5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene, triazine, aza-triphenylene, aza-carbazole, aza-indolocarbazole, aza-dibenzothiophene, aza-dibenzofuran, aza-dibenzoselenophene, aza-5a,2-benzo[d]benzo[4,5]imidazo[3,2-a]imidazole, and aza-(5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene).

[0186]In some embodiments, the host may be selected from the group consisting of:

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and combinations thereof.

[0187]In some embodiments, the organic layer may further comprise a host, wherein the host comprises a metal complex.

[0188]In some embodiments, the compound as described herein may be a sensitizer; wherein the device may further comprise an acceptor; and wherein the acceptor may be selected from the group consisting of fluorescent emitter, delayed fluorescence emitter, and combination thereof.

[0189]In yet another aspect, the OLED of the present disclosure may also comprise an emissive region containing a compound as disclosed in the above compounds section of the present disclosure.

[0190]In some embodiments, the emissive region may comprise a compound comprising a ligand LA of a structure of

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    • [0191]wherein each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W; custom-character is a single bond or a double bond; X1-X4 are each independently C or N; the maximum number of N atoms that can connect to each other within a ring is two; Z is selected from the group consisting of BR and BRR′; YA is selected from the group consisting of O, S, Se, NR, CR, CRR′, BR, BRR′, and SiRR′; RA and RB each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring; each of R, R′, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of the general substituents defined herein; and any two adjacent R, R′, RA, or RB can be joined or fused to form a ring, wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au; wherein M can be coordinated to other ligands; and wherein the ligand LA can be monodentate, bidentate, tridentate, tetradentate, pentadentate, or hexadentate, with the proviso that ligand LA does not comprise a structure of
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    • [0192]wherein the dashed lines indicate direct bonds to M.

[0193]In some embodiments, at least one of the anode, the cathode, or a new layer disposed over the organic emissive layer functions as an enhancement layer. The enhancement layer comprises a plasmonic material exhibiting surface plasmon resonance that non-radiatively couples to the emitter material and transfers excited state energy from the emitter material to non-radiative mode of surface plasmon polariton. The enhancement layer is provided no more than a threshold distance away from the organic emissive layer, wherein the emitter material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer and the threshold distance is where the total non-radiative decay rate constant is equal to the total radiative decay rate constant. In some embodiments, the OLED further comprises an outcoupling layer. In some embodiments, the outcoupling layer is disposed over the enhancement layer on the opposite side of the organic emissive layer. In some embodiments, the outcoupling layer is disposed on opposite side of the emissive layer from the enhancement layer but still outcouples energy from the surface plasmon mode of the enhancement layer. The outcoupling layer scatters the energy from the surface plasmon polaritons. In some embodiments this energy is scattered as photons to free space. In other embodiments, the energy is scattered from the surface plasmon mode into other modes of the device such as but not limited to the organic waveguide mode, the substrate mode, or another waveguiding mode. If energy is scattered to the non-free space mode of the OLED other outcoupling schemes could be incorporated to extract that energy to free space. In some embodiments, one or more intervening layer can be disposed between the enhancement layer and the outcoupling layer. The examples for interventing layer(s) can be dielectric materials, including organic, inorganic, perovskites, oxides, and may include stacks and/or mixtures of these materials.

[0194]The enhancement layer modifies the effective properties of the medium in which the emitter material resides resulting in any or all of the following: a decreased rate of emission, a modification of emission line-shape, a change in emission intensity with angle, a change in the stability of the emitter material, a change in the efficiency of the OLED, and reduced efficiency roll-off of the OLED device. Placement of the enhancement layer on the cathode side, anode side, or on both sides results in OLED devices which take advantage of any of the above-mentioned effects. In addition to the specific functional layers mentioned herein and illustrated in the various OLED examples shown in the figures, the OLEDs according to the present disclosure may include any of the other functional layers often found in OLEDs.

[0195]The enhancement layer can be comprised of plasmonic materials, optically active metamaterials, or hyperbolic metamaterials. As used herein, a plasmonic material is a material in which the real part of the dielectric constant crosses zero in the visible or ultraviolet region of the electromagnetic spectrum. In some embodiments, the plasmonic material includes at least one metal. In such embodiments the metal may include at least one of Ag, Al, Au, Ir, Pt, Ni, Cu, W, Ta, Fe, Cr, Mg, Ga, Rh, Ti, Ru, Pd, In, Bi, Ca alloys or mixtures of these materials, and stacks of these materials. In general, a metamaterial is a medium composed of different materials where the medium as a whole acts differently than the sum of its material parts. In particular, we define optically active metamaterials as materials which have both negative permittivity and negative permeability. Hyperbolic metamaterials, on the other hand, are anisotropic media in which the permittivity or permeability are of different sign for different spatial directions. Optically active metamaterials and hyperbolic metamaterials are strictly distinguished from many other photonic structures such as Distributed Bragg Reflectors (“DBRs”) in that the medium should appear uniform in the direction of propagation on the length scale of the wavelength of light. Using terminology that one skilled in the art can understand: the dielectric constant of the metamaterials in the direction of propagation can be described with the effective medium approximation. Plasmonic materials and metamaterials provide methods for controlling the propagation of light that can enhance OLED performance in a number of ways.

[0196]In some embodiments, the enhancement layer is provided as a planar layer. In other embodiments, the enhancement layer has wavelength-sized features that are arranged periodically, quasi-periodically, or randomly, or sub-wavelength-sized features that are arranged periodically, quasi-periodically, or randomly. In some embodiments, the wavelength-sized features and the sub-wavelength-sized features have sharp edges.

[0197]In some embodiments, the outcoupling layer has wavelength-sized features that are arranged periodically, quasi-periodically, or randomly, or sub-wavelength-sized features that are arranged periodically, quasi-periodically, or randomly. In some embodiments, the outcoupling layer may be composed of a plurality of nanoparticles and in other embodiments the outcoupling layer is composed of a plurality of nanoparticles disposed over a material. In these embodiments the outcoupling may be tunable by at least one of varying a size of the plurality of nanoparticles, varying a shape of the plurality of nanoparticles, changing a material of the plurality of nanoparticles, adjusting a thickness of the material, changing the refractive index of the material or an additional layer disposed on the plurality of nanoparticles, varying a thickness of the enhancement layer, and/or varying the material of the enhancement layer.

[0198]The plurality of nanoparticles of the device may be formed from at least one of metal, dielectric material, semiconductor materials, an alloy of metal, a mixture of dielectric materials, a stack or layering of one or more materials, and/or a core of one type of material and that is coated with a shell of a different type of material. In some embodiments, the outcoupling layer is composed of at least metal nanoparticles wherein the metal is selected from the group consisting of Ag, Al, Au, Ir, Pt, Ni, Cu, W, Ta, Fe, Cr, Mg, Ga, Rh, Ti, Ru, Pd, In, Bi, Ca, alloys or mixtures of these materials, and stacks of these materials. The plurality of nanoparticles may have additional layer disposed over them. In some embodiments, the polarization of the emission can be tuned using the outcoupling layer. Varying the dimensionality and periodicity of the outcoupling layer can select a type of polarization that is preferentially outcoupled to air. In some embodiments the outcoupling layer also acts as an electrode of the device.

[0199]In yet another aspect, the present disclosure also provides a consumer product comprising an organic light-emitting device (OLED) having an anode; a cathode; and an organic layer disposed between the anode and the cathode, wherein the organic layer may comprise a compound as disclosed in the above compounds section of the present disclosure.

[0200]In some embodiments, the consumer product comprises an organic light-emitting device (OLED) having an anode; a cathode; and an organic layer disposed between the anode and the cathode, wherein the organic layer may comprise a compound comprising a ligand LA of a structure of

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    • [0201]wherein each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W; custom-character is a single bond or a double bond; X1-X4 are each independently C or N; the maximum number of N atoms that can connect to each other within a ring is two; Z is selected from the group consisting of BR and BRR′; YA is selected from the group consisting of O, S, Se, NR, CR, CRR′, BR, BRR′, and SiRR′; RA and RB each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring; each of R, R′, RA, and RB is independently a hydrogen or a substituent selected from the group consisting of the general substituents defined herein; and any two adjacent R, R′, RA, or RB can be joined or fused to form a ring, wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au; wherein M can be coordinated to other ligands; and wherein the ligand LA can be monodentate, bidentate, tridentate, tetradentate, pentadentate, or hexadentate, with the proviso that ligand LA does not comprise a structure of
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    • [0202]wherein the dashed lines indicate direct bonds to M.

[0203]In some embodiments, the consumer product can be one of a flat panel display, a computer monitor, a medical monitor, a television, a billboard, a light for interior or exterior illumination and/or signaling, a heads-up display, a fully or partially transparent display, a flexible display, a laser printer, a telephone, a cell phone, tablet, a phablet, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a camcorder, a viewfinder, a micro-display that is less than 2 inches diagonal, a 3-D display, a virtual reality or augmented reality display, a vehicle, a video wall comprising multiple displays tiled together, a theater or stadium screen, a light therapy device, and a sign.

[0204]Generally, an OLED comprises at least one organic layer disposed between and electrically connected to an anode and a cathode. When a current is applied, the anode injects holes and the cathode injects electrons into the organic layer(s). The injected holes and electrons each migrate toward the oppositely charged electrode. When an electron and hole localize on the same molecule, an “exciton,” which is a localized electron-hole pair having an excited energy state, is formed. Light is emitted when the exciton relaxes via a photoemissive mechanism. In some cases, the exciton may be localized on an excimer or an exciplex. Non-radiative mechanisms, such as thermal relaxation, may also occur, but are generally considered undesirable.

[0205]Several OLED materials and configurations are described in U.S. Pat. Nos. 5,844,363, 6,303,238, and 5,707,745, which are incorporated herein by reference in their entirety.

[0206]The initial OLEDs used emissive molecules that emitted light from their singlet states (“fluorescence”) as disclosed, for example, in U.S. Pat. No. 4,769,292, which is incorporated by reference in its entirety. Fluorescent emission generally occurs in a time frame of less than 10 nanoseconds.

[0207]More recently, OLEDs having emissive materials that emit light from triplet states (“phosphorescence”) have been demonstrated. Baldo et al., “Highly Efficient Phosphorescent Emission from Organic Electroluminescent Devices,” Nature, vol. 395, 151-154, 1998; (“Baldo-I”) and Baldo et al., “Very high-efficiency green organic light-emitting devices based on electrophosphorescence,” Appl. Phys. Lett., vol. 75, No. 3, 4-6 (1999) (“Baldo-II”), are incorporated by reference in their entireties. Phosphorescence is described in more detail in U.S. Pat. No. 7,279,704 at cols. 5-6, which are incorporated by reference.

[0208]FIG. 1 shows an organic light emitting device 100. The figures are not necessarily drawn to scale. Device 100 may include a substrate 110, an anode 115, a hole injection layer 120, a hole transport layer 125, an electron blocking layer 130, an emissive layer 135, a hole blocking layer 140, an electron transport layer 145, an electron injection layer 150, a protective layer 155, a cathode 160, and a barrier layer 170. Cathode 160 is a compound cathode having a first conductive layer 162 and a second conductive layer 164. Device 100 may be fabricated by depositing the layers described, in order. The properties and functions of these various layers, as well as example materials, are described in more detail in U.S. Pat. No. 7,279,704 at cols. 6-10, which are incorporated by reference.

[0209]More examples for each of these layers are available. For example, a flexible and transparent substrate-anode combination is disclosed in U.S. Pat. No. 5,844,363, which is incorporated by reference in its entirety. An example of a p-doped hole transport layer is m-MTDATA doped with F4-TCNQ at a molar ratio of 50:1, as disclosed in U.S. Patent Application Publication No. 2003/0230980, which is incorporated by reference in its entirety. Examples of emissive and host materials are disclosed in U.S. Pat. No. 6,303,238 to Thompson et al., which is incorporated by reference in its entirety. An example of an n-doped electron transport layer is BPhen doped with Li at a molar ratio of 1:1, as disclosed in U.S. Patent Application Publication No. 2003/0230980, which is incorporated by reference in its entirety. U.S. Pat. Nos. 5,703,436 and 5,707,745, which are incorporated by reference in their entireties, disclose examples of cathodes including compound cathodes having a thin layer of metal such as Mg:Ag with an overlying transparent, electrically-conductive, sputter-deposited ITO layer. The theory and use of blocking layers is described in more detail in U.S. Pat. No. 6,097,147 and U.S. Patent Application Publication No. 2003/0230980, which are incorporated by reference in their entireties. Examples of injection layers are provided in U.S. Patent Application Publication No. 2004/0174116, which is incorporated by reference in its entirety. A description of protective layers may be found in U.S. Patent Application Publication No. 2004/0174116, which is incorporated by reference in its entirety.

[0210]FIG. 2 shows an inverted OLED 200. The device includes a substrate 210, a cathode 215, an emissive layer 220, a hole transport layer 225, and an anode 230. Device 200 may be fabricated by depositing the layers described, in order. Because the most common OLED configuration has a cathode disposed over the anode, and device 200 has cathode 215 disposed under anode 230, device 200 may be referred to as an “inverted” OLED. Materials similar to those described with respect to device 100 may be used in the corresponding layers of device 200. FIG. 2 provides one example of how some layers may be omitted from the structure of device 100.

[0211]The simple layered structure illustrated in FIGS. 1 and 2 is provided by way of non-limiting example, and it is understood that embodiments of the present disclosure may be used in connection with a wide variety of other structures. The specific materials and structures described are exemplary in nature, and other materials and structures may be used. Functional OLEDs may be achieved by combining the various layers described in different ways, or layers may be omitted entirely, based on design, performance, and cost factors. Other layers not specifically described may also be included. Materials other than those specifically described may be used. Although many of the examples provided herein describe various layers as comprising a single material, it is understood that combinations of materials, such as a mixture of host and dopant, or more generally a mixture, may be used. Also, the layers may have various sublayers. The names given to the various layers herein are not intended to be strictly limiting. For example, in device 200, hole transport layer 225 transports holes and injects holes into emissive layer 220, and may be described as a hole transport layer or a hole injection layer. In one embodiment, an OLED may be described as having an “organic layer” disposed between a cathode and an anode. This organic layer may comprise a single layer, or may further comprise multiple layers of different organic materials as described, for example, with respect to FIGS. 1 and 2.

[0212]Structures and materials not specifically described may also be used, such as OLEDs comprised of polymeric materials (PLEDs) such as disclosed in U.S. Pat. No. 5,247,190 to Friend et al., which is incorporated by reference in its entirety. By way of further example, OLEDs having a single organic layer may be used. OLEDs may be stacked, for example as described in U.S. Pat. No. 5,707,745 to Forrest et al, which is incorporated by reference in its entirety. The OLED structure may deviate from the simple layered structure illustrated in FIGS. 1 and 2. For example, the substrate may include an angled reflective surface to improve out-coupling, such as a mesa structure as described in U.S. Pat. No. 6,091,195 to Forrest et al., and/or a pit structure as described in U.S. Pat. No. 5,834,893 to Bulovic et al., which are incorporated by reference in their entireties.

[0213]Unless otherwise specified, any of the layers of the various embodiments may be deposited by any suitable method. For the organic layers, preferred methods include thermal evaporation, ink-jet, such as described in U.S. Pat. Nos. 6,013,982 and 6,087,196, which are incorporated by reference in their entireties, organic vapor phase deposition (OVPD), such as described in U.S. Pat. No. 6,337,102 to Forrest et al., which is incorporated by reference in its entirety, and deposition by organic vapor jet printing (OVJP, also referred to as organic vapor jet deposition (OVJD)), such as described in U.S. Pat. No. 7,431,968, which is incorporated by reference in its entirety. Other suitable deposition methods include spin coating and other solution based processes. Solution based processes are preferably carried out in nitrogen or an inert atmosphere. For the other layers, preferred methods include thermal evaporation. Preferred patterning methods include deposition through a mask, cold welding such as described in U.S. Pat. Nos. 6,294,398 and 6,468,819, which are incorporated by reference in their entireties, and patterning associated with some of the deposition methods such as ink-jet and organic vapor jet printing (OVJP). Other methods may also be used. The materials to be deposited may be modified to make them compatible with a particular deposition method. For example, substituents such as alkyl and aryl groups, branched or unbranched, and preferably containing at least 3 carbons, may be used in small molecules to enhance their ability to undergo solution processing. Substituents having 20 carbons or more may be used, and 3-20 carbons are a preferred range. Materials with asymmetric structures may have better solution processability than those having symmetric structures, because asymmetric materials may have a lower tendency to recrystallize. Dendrimer substituents may be used to enhance the ability of small molecules to undergo solution processing.

[0214]Devices fabricated in accordance with embodiments of the present disclosure may further optionally comprise a barrier layer. One purpose of the barrier layer is to protect the electrodes and organic layers from damaging exposure to harmful species in the environment including moisture, vapor and/or gases, etc. The barrier layer may be deposited over, under or next to a substrate, an electrode, or over any other parts of a device including an edge. The barrier layer may comprise a single layer, or multiple layers. The barrier layer may be formed by various known chemical vapor deposition techniques and may include compositions having a single phase as well as compositions having multiple phases. Any suitable material or combination of materials may be used for the barrier layer. The barrier layer may incorporate an inorganic or an organic compound or both. The preferred barrier layer comprises a mixture of a polymeric material and a non-polymeric material as described in U.S. Pat. No. 7,968,146, PCT Pat. Application Nos. PCT/US2007/023098 and PCT/US2009/042829, which are herein incorporated by reference in their entireties. To be considered a “mixture”, the aforesaid polymeric and non-polymeric materials comprising the barrier layer should be deposited under the same reaction conditions and/or at the same time. The weight ratio of polymeric to non-polymeric material may be in the range of 95:5 to 5:95. The polymeric material and the non-polymeric material may be created from the same precursor material. In one example, the mixture of a polymeric material and a non-polymeric material consists essentially of polymeric silicon and inorganic silicon.

[0215]Devices fabricated in accordance with embodiments of the present disclosure can be incorporated into a wide variety of electronic component modules (or units) that can be incorporated into a variety of electronic products or intermediate components. Examples of such electronic products or intermediate components include display screens, lighting devices such as discrete light source devices or lighting panels, etc. that can be utilized by the end-user product manufacturers. Such electronic component modules can optionally include the driving electronics and/or power source(s). Devices fabricated in accordance with embodiments of the present disclosure can be incorporated into a wide variety of consumer products that have one or more of the electronic component modules (or units) incorporated therein. A consumer product comprising an OLED that includes the compound of the present disclosure in the organic layer in the OLED is disclosed. Such consumer products would include any kind of products that include one or more light source(s) and/or one or more of some type of visual displays. Some examples of such consumer products include flat panel displays, curved displays, computer monitors, medical monitors, televisions, billboards, lights for interior or exterior illumination and/or signaling, heads-up displays, fully or partially transparent displays, flexible displays, rollable displays, foldable displays, stretchable displays, laser printers, telephones, mobile phones, tablets, phablets, personal digital assistants (PDAs), wearable devices, laptop computers, digital cameras, camcorders, viewfinders, micro-displays (displays that are less than 2 inches diagonal), 3-D displays, virtual reality or augmented reality displays, vehicles, video walls comprising multiple displays tiled together, theater or stadium screen, a light therapy device, and a sign. Various control mechanisms may be used to control devices fabricated in accordance with the present disclosure, including passive matrix and active matrix. Many of the devices are intended for use in a temperature range comfortable to humans, such as 18 degrees C. to 30 degrees C., and more preferably at room temperature (20-25° C.), but could be used outside this temperature range, for example, from −40 degree C. to +80° C.

[0216]More details on OLEDs, and the definitions described above, can be found in U.S. Pat. No. 7,279,704, which is incorporated herein by reference in its entirety.

[0217]The materials and structures described herein may have applications in devices other than OLEDs. For example, other optoelectronic devices such as organic solar cells and organic photodetectors may employ the materials and structures. More generally, organic devices, such as organic transistors, may employ the materials and structures.

[0218]In some embodiments, the OLED has one or more characteristics selected from the group consisting of being flexible, being rollable, being foldable, being stretchable, and being curved. In some embodiments, the OLED is transparent or semi-transparent. In some embodiments, the OLED further comprises a layer comprising carbon nanotubes.

[0219]In some embodiments, the OLED further comprises a layer comprising a delayed fluorescent emitter. In some embodiments, the OLED comprises a RGB pixel arrangement or white plus color filter pixel arrangement. In some embodiments, the OLED is a mobile device, a hand held device, or a wearable device. In some embodiments, the OLED is a display panel having less than 10 inch diagonal or 50 square inch area. In some embodiments, the OLED is a display panel having at least 10 inch diagonal or 50 square inch area. In some embodiments, the OLED is a lighting panel.

[0220]In some embodiments, the compound can be an emissive dopant. In some embodiments, the compound can produce emissions via phosphorescence, fluorescence, thermally activated delayed fluorescence, i.e., TADF (also referred to as E-type delayed fluorescence; see, e.g., U.S. application Ser. No. 15/700,352, which is hereby incorporated by reference in its entirety), triplet-triplet annihilation, or combinations of these processes.

[0221]In some embodiments, the emissive dopant can be a racemic mixture, or can be enriched in one enantiomer. In some embodiments, the compound can be homoleptic (each ligand is the same). In some embodiments, the compound can be heteroleptic (at least one ligand is different from others). When there are more than one ligand coordinated to a metal, the ligands can all be the same in some embodiments. In some other embodiments, at least one ligand is different from the other ligands. In some embodiments, every ligand can be different from each other. This is also true in embodiments where a ligand being coordinated to a metal can be linked with other ligands being coordinated to that metal to form a tridentate, tetradentate, pentadentate, or hexadentate ligands. Thus, where the coordinating ligands are being linked together, all of the ligands can be the same in some embodiments, and at least one of the ligands being linked can be different from the other ligand(s) in some other embodiments.

[0222]In some embodiments, the compound can be used as a phosphorescent sensitizer in an OLED where one or multiple layers in the OLED contains an acceptor in the form of one or more fluorescent and/or delayed fluorescence emitters. In some embodiments, the compound can be used as one component of an exciplex to be used as a sensitizer. As a phosphorescent sensitizer, the compound must be capable of energy transfer to the acceptor and the acceptor will emit the energy or further transfer energy to a final emitter. The acceptor concentrations can range from 0.001% to 100%. The acceptor could be in either the same layer as the phosphorescent sensitizer or in one or more different layers. In some embodiments, the acceptor is a TADF emitter. In some embodiments, the acceptor is a fluorescent emitter. In some embodiments, the emission can arise from any or all of the sensitizer, acceptor, and final emitter,

[0223]According to another aspect, a formulation comprising the compound described herein is also disclosed.

[0224]The OLED disclosed herein can be incorporated into one or more of a consumer product, an electronic component module, and a lighting panel. The organic layer can be an emissive layer and the compound can be an emissive dopant in some embodiments, while the compound can be a non-emissive dopant in other embodiments.

[0225]In yet another aspect of the present disclosure, a formulation that comprises the novel compound disclosed herein is described. The formulation can include one or more components selected from the group consisting of a solvent, a host, a hole injection material, hole transport material, electron blocking material, hole blocking material, and an electron transport material, disclosed herein.

[0226]The present disclosure encompasses any chemical structure comprising the novel compound of the present disclosure, or a monovalent or polyvalent variant thereof. In other words, the inventive compound, or a monovalent or polyvalent variant thereof, can be a part of a larger chemical structure. Such chemical structure can be selected from the group consisting of a monomer, a polymer, a macromolecule, and a supramolecule (also known as supermolecule). As used herein, a “monovalent variant of a compound” refers to a moiety that is identical to the compound except that one hydrogen has been removed and replaced with a bond to the rest of the chemical structure. As used herein, a “polyvalent variant of a compound” refers to a moiety that is identical to the compound except that more than one hydrogen has been removed and replaced with a bond or bonds to the rest of the chemical structure. In the instance of a supramolecule, the inventive compound can also be incorporated into the supramolecule complex without covalent bonds.

D. Combination of the Compounds of the Present Disclosure with Other Materials

[0227]The materials described herein as useful for a particular layer in an organic light emitting device may be used in combination with a wide variety of other materials present in the device. For example, emissive dopants disclosed herein may be used in conjunction with a wide variety of hosts, transport layers, blocking layers, injection layers, electrodes and other layers that may be present. The materials described or referred to below are non-limiting examples of materials that may be useful in combination with the compounds disclosed herein, and one of skill in the art can readily consult the literature to identify other materials that may be useful in combination.

a) Conductivity Dopants:

[0228]A charge transport layer can be doped with conductivity dopants to substantially alter its density of charge carriers, which will in turn alter its conductivity. The conductivity is increased by generating charge carriers in the matrix material, and depending on the type of dopant, a change in the Fermi level of the semiconductor may also be achieved. Hole-transporting layer can be doped by p-type conductivity dopants and n-type conductivity dopants are used in the electron-transporting layer.

[0229]Non-limiting examples of the conductivity dopants that may be used in an OLED in combination with materials disclosed herein are exemplified below together with references that disclose those materials: EP01617493, EP01968131, EP2020694, EP2684932, US20050139810, US20070160905, US20090167167, US2010288362, WO06081780, WO2009003455, WO2009008277, WO2009011327, WO2014009310, US2007252140, US2015060804, US20150123047, and US2012146012.

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b) HIL/HTL:

[0230]A hole injecting/transporting material to be used in the present disclosure is not particularly limited, and any compound may be used as long as the compound is typically used as a hole injecting/transporting material. Examples of the material include, but are not limited to: a phthalocyanine or porphyrin derivative; an aromatic amine derivative; an indolocarbazole derivative; a polymer containing fluorohydrocarbon; a polymer with conductivity dopants; a conducting polymer, such as PEDOT/PSS; a self-assembly monomer derived from compounds such as phosphonic acid and silane derivatives; a metal oxide derivative, such as MoOx; a p-type semiconducting organic compound, such as 1,4,5,8,9,12-Hexaazatriphenylenehexacarbonitrile; a metal complex, and a cross-linkable compounds.

[0231]HIL/HTL examples can be found in paragraphs [0111] through [0117] of Universal Display Corporation's US application publication number US2020/0,295,281A1, and the contents of these paragraphs and the whole publication are herein incorporated by reference in their entireties.

c) EBL:

[0232]An electron blocking layer (EBL) may be used to reduce the number of electrons and/or excitons that leave the emissive layer. The presence of such a blocking layer in a device may result in substantially higher efficiencies, and/or longer lifetime, as compared to a similar device lacking a blocking layer. Also, a blocking layer may be used to confine emission to a desired region of an OLED. In some embodiments, the EBL material has a higher LUMO (closer to the vacuum level) and/or higher triplet energy than the emitter closest to the EBL interface. In some embodiments, the EBL material has a higher LUMO (closer to the vacuum level) and/or higher triplet energy than one or more of the hosts closest to the EBL interface. In one aspect, the compound used in EBL contains the same molecule or the same functional groups used as one of the hosts described below.

d) Hosts:

[0233]The light emitting layer of the organic EL device of the present disclosure preferably contains at least a metal complex as light emitting material, and may contain a host material using the metal complex as a dopant material. Examples of the host material are not particularly limited, and any metal complexes or organic compounds may be used as long as the triplet energy of the host is larger than that of the dopant. Any host material may be used with any dopant so long as the triplet criteria is satisfied.

[0234]Hosts examples can be found in paragraphs [0119] through [0125] of Universal Display Corporation's US application publication number US2020/0,295,281A1, and the contents of these paragraphs and the whole publication are herein incorporated by reference in their entireties.

e) Additional Emitters:

[0235]One or more additional emitter dopants may be used in conjunction with the compound of the present disclosure. Examples of the additional emitter dopants are not particularly limited, and any compounds may be used as long as the compounds are typically used as emitter materials. Examples of suitable emitter materials include, but are not limited to, compounds which can produce emissions via phosphorescence, fluorescence, thermally activated delayed fluorescence, i.e., TADF (also referred to as E-type delayed fluorescence), triplet-triplet annihilation, or combinations of these processes.

[0236]Non-limiting examples of the emitter materials that may be used in an OLED in combination with materials disclosed herein are exemplified in paragraphs [0126] through [0127] of Universal Display Corporation's US application publication number US2020/0,295,281A1, and the contents of these paragraphs and the whole publication are herein incorporated by reference in their entireties.

f) HBL:

[0237]A hole blocking layer (HBL) may be used to reduce the number of holes and/or excitons that leave the emissive layer. The presence of such a blocking layer in a device may result in substantially higher efficiencies and/or longer lifetime as compared to a similar device lacking a blocking layer. Also, a blocking layer may be used to confine emission to a desired region of an OLED. In some embodiments, the HBL material has a lower HOMO (further from the vacuum level) and/or higher triplet energy than the emitter closest to the HBL interface. In some embodiments, the HBL material has a lower HOMO (further from the vacuum level) and/or higher triplet energy than one or more of the hosts closest to the HBL interface.

[0238]In one aspect, compound used in HBL contains the same molecule or the same functional groups used as host described above.

[0239]In another aspect, compound used in HBL contains at least one of the following groups in the molecule:

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    • [0240]wherein k is an integer from 1 to 20; L101 is another ligand, k′ is an integer from 1 to 3.

g) ETL:

[0241]Electron transport layer (ETL) may include a material capable of transporting electrons. Electron transport layer may be intrinsic (undoped), or doped. Doping may be used to enhance conductivity. Examples of the ETL material are not particularly limited, and any metal complexes or organic compounds may be used as long as they are typically used to transport electrons.

[0242]In one aspect, compound used in ETL contains at least one of the following groups in the molecule:

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    • [0243]wherein R101 is selected from the group consisting of hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acids, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof, when it is aryl or heteroaryl, it has the similar definition as Ar's mentioned above. Ar1 to Ar3 has the similar definition as Ar's mentioned above. k is an integer from 1 to 20. X101 to X108 is selected from C (including CH) or N.

[0244]In another aspect, the metal complexes used in ETL contains, but not limit to the following general formula:

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    • [0245]wherein (O—N) or (N—N) is a bidentate ligand, having metal coordinated to atoms O, N or N, N; L101 is another ligand; k′ is an integer value from 1 to the maximum number of ligands that may be attached to the metal. Non-limiting examples of the ETL materials that may be used in an OLED in combination with materials disclosed herein are exemplified in paragraphs [0131] through [0134] of Universal Display Corporation's US application publication number US2020/0,295,281A1, and the contents of these paragraphs and the whole publication are herein incorporated by reference in their entireties.

h) Charge Generation Layer (CGL)

[0246]In tandem or stacked OLEDs, the CGL plays an essential role in the performance, which is composed of an n-doped layer and a p-doped layer for injection of electrons and holes, respectively. Electrons and holes are supplied from the CGL and electrodes. The consumed electrons and holes in the CGL are refilled by the electrons and holes injected from the cathode and anode, respectively; then, the bipolar currents reach a steady state gradually. Typical CGL materials include n and p conductivity dopants used in the transport layers.

[0247]In any above-mentioned compounds used in each layer of the OLED device, the hydrogen atoms can be partially or fully deuterated. The minimum amount of hydrogen of the compound being deuterated is selected from the group consisting of 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 99%, and 100%. Thus, any specifically listed substituent, such as, without limitation, methyl, phenyl, pyridyl, etc. may be undeuterated, partially deuterated, and fully deuterated versions thereof. Similarly, classes of substituents such as, without limitation, alkyl, aryl, cycloalkyl, heteroaryl, etc. also may be undeuterated, partially deuterated, and fully deuterated versions thereof.

[0248]It is understood that the various embodiments described herein are by way of example only and are not intended to limit the scope of the invention. For example, many of the materials and structures described herein may be substituted with other materials and structures without deviating from the spirit of the invention. The present invention as claimed may therefore include variations from the particular examples and preferred embodiments described herein, as will be apparent to one of skill in the art. It is understood that various theories as to why the invention works are not intended to be limiting.

E. Experimental Section

Synthetic Route

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Synthesis of 1-Methyl-4-phenoxy-1H-imidazole (Compound 2)

[0249]A mixture of 4-iodo-1-methyl-1H-imidazole (15.0 g, 72.1 mmol, 1.0 equiv), phenol (12.2 g, 130 mmol, 1.8 equiv), cesium carbonate (70.5 g, 216 mmol, 3.0 equiv), and dimethyl sulfoxide (144 mL) was sparged under nitrogen for 30 minutes. 1-(Pyridin-2-yl)propan-2-one (1.95 g, 14.4 mmol, 0.2 equiv) and copper(I) bromide (1.03 g, 7.21 mmol, 0.1 equiv) were then added. Upon addition, the reaction mixture was sparged under nitrogen for another 10 minutes, and then heated to 120° C. for 17 hours. Upon completion, the reaction mixture was cooled to room temperature (RT) and then poured into a mixture of DI-water (1.2 L) and dichloromethane (600 mL). The bi-layer mixture was filtered through a pad of celite (240 g) and the celite pad was rinsed with dichloromethane (400 mL). The organic layer was isolated and the aqueous layer was extracted with dichloromethane (3×300 mL). The combined organic layer was dried with sodium sulfate, and concentrated under reduced pressure. The crude product was absorbed onto Celite (Diatomaceous earth)(120 g) and purified on an Interchim automated chromatography system (Biotage Sfar 350 g silica column), eluting with 75% ethyl acetate in hexane with 2% triethylamine to give compound 2 (7.36 g, 56% yield, 96% GC purity) as an orange oil.

Synthesis of 1-(3-((9-(4-(tert-butyl)pyridin-2-yl)-9H-carbazol-2-yl)oxy)phenyl)-3-methyl-5-phenoxy-1H-imidazol-3-ium tetrafluoroborate (Intermediate 2)

[0250]A mixture of compound 2 (500 mg, 2.24 mmol, 1 equiv), Intermediate 1 (1.6 g, 2.24 mmol, 1 equiv), and copper (II) triflate (0.08 g, 0.22 mmol, 0.1 equiv) in anhydrous N,N-dimethylformamide (11.2 mL) was sparged with nitrogen for 15 minutes. The reaction was heated at 100° C. overnight, at which time, LC/MS analysis indicated full conversion. The reaction mixture was cooled to RT and concentrated under reduced pressure. The crude material was absorbed onto Celite (12 g) and purified on an Interchim automated chromatography system (Biotage, 50 g silica gel column), eluting with a gradient of 5 to 30% ethyl acetate with 5% methanol in hexanes to give Intermediate 2 (960 mg, 66% yield) as a tan solid.

Synthesis of (1-(3-((9-(4-(tert-butyl)pyridin-2-yl)-9H-carbazol-2-yl)oxy)phenyl)-3-methyl-5-phenoxy-1H-imidazol-3-ium)platinum(II) (Intermediate 3)

[0251]A mixture of Intermediate 2 (420 mg, 0.64 mmol, 1 equiv), dichloro(1,5-cyclooctadiene)platinum(II) (265 mg, 0.71 mmol, 1.1 equiv) and potassium carbonate (3 equiv) in 1,2-dichlorobenzene (16.1 mL) was sparged with nitrogen for 15 minutes. The reaction was heated at 160° C. overnight, at which time, LC/MS analysis indicated full conversion. Another batch of Intermediate 2 (420 mg, 0.64 mmol, 1 equiv) was reacted as described above and the combined material was purified on an Interchim automated chromatography system (Biotage, 100 g silica gel column), eluting with 100% then a gradient of 0-100% dichloromethane in hexanes to give Intermediate 3 (450 mg, 46% yield) as a yellow solid.

Synthesis of (3-(3-((9-(4-(tert-butyl)pyridin-2-yl)-9H-carbazol-2-yl)oxy)phenyl)-9-mesityl-1-methyl-3,9-dihydro-1λ 4 -benzo[5,6][1,4]oxaborinino[2,3-d]imidazole) platinum(II) (Inventive Compound)

[0252]A solution of compound Intermediate 3 (100 mg, 0.13 mmol, 1.0 equiv) in anhydrous dichlorobenzene (2.7 mL) was sparged with nitrogen for 10 minutes. The solution was cooled down to 0° C. in an ice bath, 1.6 M n-butyllithium (91 μL, 0.15 mmol, 1.1 equiv) was added dropwise, and the reaction was continued stirring at 0° C. for 30 minutes. Tribromoborane (14 μL, 0.15 mmol, 1.1 equiv) was added to this solution at 0° C. The mixture was slowly warmed to 40° C. After 30 minutes, it was cooled down to RT and left to stir overnight. Diisopropylethylamine (46 μL, 0.26 mmol, 2.0 equiv) was then added and the reaction mixture was heated at 150° C. for 3 hours. Simultaneously, a separate vial contained 2-iodomesitylene (35.7 mg, 0.15 mmol, 1.1 equiv) in anhydrous diethylether (0.5 mL) was cooled to −78° C. in an ice bath (dry ice/acetone). 1.6 M n-butyllithium (91 μL, 0.15 mmol, 1.1 equiv) was added to the vial. This mixture was stirred at −78° C. for 30 minutes, a fine white precipitate appeared. The first reaction vial was cooled to 0° C., then mesityl-lithium suspension was added. This reaction mixture was slowly warm to 40° C. After 30 minutes, it was cooled to RT and continued to stir for an extra 30 minutes towards the Inventive compound. An aliquot of the crude reaction mixture was passed through a 0.2 μm filter, and the resultant sample of isolated inventive compound was used for PL characterization.

Photophysical Characterization

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[0253]FIGS. 3A, 3B, and 3C show the emission spectra of an inventive compound and a comparative compound in 2-MeTHF and in PMMA at room temperature, and in 2-MeTHF at 77 K, respectively, and Table 1 below shows some of the properties of these spectra.

TABLE 1
Photophysical properties of inventive and comparison compounds
λmax,2-MeTHF,RT λmax,2-MeTHF,77K λmax,PMMA,RT
(nm)(nm)(nm)
Inventive446436447
compound
Comparison452442449
compound

[0254]The inventive compound shows a blue-shift in emission in all media relative to the comparison compound bearing the benzimidazolium carbene. The obtained blue-shift helps in achieving deep blue emission required for high color purity in display applications.

Claims

What is claimed is:

1. A compound comprising a ligand LA, wherein the ligand LA comprises a structure of

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wherein:

each of moiety A and moiety B is independently a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W;

moiety B1 is a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings;

X1-X4 are each independently C or N;

the maximum number of N atoms that can connect to each other within a ring is two;

Z is selected from the group consisting of BR and BRR′;

YA is selected from the group consisting of N, C, CR′, B, BR′, and SiR′;

RA, RB, and RBi each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring;

each of R, R′, RA, RB and RB1 is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

any two adjacent R, R′, RA, RB, or RBi can be joined or fused to form a ring,

wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au;

wherein the ligand LA is coordinated to metal M through the dash lines;

wherein M can be coordinated to other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.

2. The compound of claim 1, wherein each of R, R′, RA, RB, and RB1 is independently a hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof.

3. The compound of claim 1, wherein M is Ir.

4. The compound of claim 1, wherein moiety A is coordinated directly to metal M by an N-M bond.

5. The compound of claim 1, wherein moiety A is pyridine or benzimidazole and moiety A is coordinated directly to metal M by an N-M bond.

6. The compound of claim 1, wherein at least one of X1 or X2 is N.

7. The compound of claim 1, wherein moiety B is a polycyclic fused ring structure and X2 is N.

8. The compound of claim 1, wherein the ring of moiety B containing X2 is a 5-membered ring.

9. The compound of claim 1, wherein moiety B1 is a monocyclic 5-membered or 6-membered carbocyclic or heterocyclic ring.

10. The compound of claim 9, wherein moiety B1 is benzene.

11. The compound of claim 1, wherein Z is BR.

12. The compound of claim 1, wherein Z is BR and the R comprises at least one aryl group.

13. The compound of claim 1, wherein Z is BR and the R comprises at least two aryl groups.

14. The compound claim 1, wherein the ligand LA is selected from the group consisting of:

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wherein each X is independently C or N;

wherein each Qqp can be independently selected from the group consisting of:

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wherein each RAi, RCk, RCl, RCn, ZBi, ZBj, and ZCi is independently selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

15. The compound claim 14, wherein the ligand LA is selected from the group consisting of:

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16. The compound of claim 1, wherein the ligand LA comprises at least one substitutent selected from the group consisting of

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17. The compound of claim 1, wherein the compound has a structure of

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wherein:

M1 is Pd or Pt;

moiety Q is Formula IIE;

moieties F and E are each independently a monocyclic or polycyclic fused ring structure comprising a 5-membered and/or 6-membered carbocyclic or heterocyclic rings;

Z4 and Z5 are each independently C or N;

K1, K2, K3, and K4 are each independently selected from the group consisting of a direct bond, O, and S, wherein at least two of them are direct bonds;

L1, L2, and L3 are each independently selected from the group consisting of a single bond, absent a bond, O, Se, S, SO, SO2, C═O, C=CR′R″, C=NR′R″, CR′R″, SiR′R″, BR′, P(O)R′, and NR′, wherein at least one of L1 and L2 is present;

X20-X22 are each independently C or N;

RF and RE each independently represents zero, mono, or up to the maximum allowed number of substitutions to its associated ring; and

each of R′, R″, RF, and RE is independently a hydrogen or a substituent selected from the group consisting of deuterium, fluorine, alkyl, cycloalkyl, heteroalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, aryl, heteroaryl, nitrile, isonitrile, sulfanyl, and combinations thereof.

18. The compound of claim 17, wherein the compound is selected from the group consisting of compounds having the formula of Pt(LA′)(Ly):

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wherein LA′ is selected from the group consisting of:

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wherein Ly is selected from the group consisting of:

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wherein X is each independently C or N;

wherein Y1A, Y1B, Y1C, and Y1D are each independently selected from the group consisting of O, S, Se, NRCi, PRCi, BRCi, CRCiRCj, and SiRC1RCj

wherein ZBi and ZB, are independently selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;

wherein Qqp is selected from the group consisting of:

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and

wherein RE, RF, RX, RY, RAi, RCi, RCj, RCk, RCl, RCm, and RCn are each independently selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof.

19. An organic light emitting device (OLED) comprising:

an anode;

a cathode; and

an organic layer disposed between the anode and the cathode,

wherein the organic layer comprises the compound

comprising a ligand LA, wherein the ligand LA comprises a structure of

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wherein:

each of moiety A and moiety B is independently a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W;

moiety B1 is a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings;

X1-X4 are each independently C or N;

the maximum number of N atoms that can connect to each other within a ring is two;

Z is selected from the group consisting of BR and BRR′;

YA is selected from the group consisting of N, C, CR′, B, BR′, and SiR′;

RA, RB, and RB1 each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring;

each of R, R′, RA, RB and RB1 is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

any two adjacent R, R′, RA, RB, or RB1 can be joined or fused to form a ring,

wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au;

wherein the ligand LA is coordinated to metal M through the dash lines; and

wherein M can be coordinated to other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.

20. A chemical structure comprising a compound or a monovalent or polyvalent variant thereof; wherein the compound comprises a ligand LA, wherein the ligand LA comprises a structure of

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wherein:

each of moiety A and moiety B is independently a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings with at least one of these rings being a 5-membered ring and directly fused to ring W;

moiety B1 is a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered carbocyclic or heterocyclic rings;

X1-X4 are each independently C or N;

the maximum number of N atoms that can connect to each other within a ring is two;

Z is selected from the group consisting of BR and BRR′;

YA is selected from the group consisting of N, C, CR′, B, BR′, and SiR′;

RA, RB, and RB1 each independently represent zero, mono, or up to the maximum allowed number of substitutions to its associated ring;

each of R, R′, RA, RB and RB1 is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, germyl, boryl, selenyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and

any two adjacent R, R′, RA, RB, or RB1 can be joined or fused to form a ring,

wherein the ligand LA is coordinated to a metal M selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au;

wherein the ligand LA is coordinated to metal M through the dash lines; and

wherein M can be coordinated to other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand.